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before we leave chapter four we're going to do a quick review algebraic tuesday
problems
we were first working with these back in chapter one we wouldn't have explosive
review false five
here we would work with the signs are very warm
we were being removed
first so we do the opposite operation
to the other server plus three would be my history
needed it to both sides of the balance equation
blustery minus three would cancel we have zero next woodruff now
five minus three means to you
we do a quick check
soon to blossom is fine here is a misnomer
or we got a problem where we would have three x
is equal to fifteen
teamwork backwards again because this is a multi-nation problem
newly papa said property
we should be in my view
we do it to both sides how many trees and three
wonder basically didn't cancel out
reason the fifteen s five hindu quick check
returns scientist fifteen always love
when we get a two-step problem
where we would have two acts plus
three equals fifteen
where again we would work backwards always dealing with the force of the
minus first
when we would take away three again we put our operation signs and so we knew
what we were doing
plus remind us that he was cancelled that was the first step into actual
dropdown
returned fifteen whose twelve
and then we would have to get still stay single packs
so we would abide by the number in front of the variable just like to get up
there
i'd like to both sides
annexes people to six when you're back in real quick
u_-turn six as well plus three is fifteen
so we've got all of those nothing knew there that was just a review
the only thing we're gonna do news here is simply use the same principles we
have done before we're just going to use variables
for us to the just walls
with our variables
so we have minus seven point six
tune in to do that for still need to worry about the two point five x
remember for sure just gonna deal with the plus or minus part
to review plus
seven points x
plus seven point six again i would write down the operation signs
minus seven point six plus
seven points expiry zero
two point five x is going to drop down simpson adding
you know point for someone to have twenty point four
when the other side of the equation
soren except that if this were working backwards wanna get explain self-assured
and abide by the number in front of the variable
though the number in front of the very well this time as a decimal doesn't
matter
slackening change how we do the problem
members of the four rules or processes don't change
signified by the number of resident evil
how many two point five to two point five one they have one actually don't
need to write the one
and then when i do my math error twenty point four divided by two point five
familiarity
point one six
i'd go ahead and do that on the calculator
not a problem
so let's do one more of these twisted problem number three
this is from number one
pan am one point eight ex
slots this time seven point six
people's twelve point wong
the only one that works
so we're going to deal with the pluses in the minuses first political minus six
point seven
minus six point seven of them right the operation member what we need to do here
we had a plus
tuna subtract
plus and minus goes to zero weapons just
one point a tax on this side
bar all there
decimals drops radar numbers alone
clean up five point four
to our next step is to get a single acts
identified by the number in front of the variable life we've always do
so we might buy a one point a
warned foreign aid
one in one way who is
cancels out
one point eight and a five point four
eighty nos in fifty four three times a one point eight years in the pipeline
for three times
so again there's nothing really new here that we're introducing
then there were using just walls and processes loophole really worried
syndrome so let me see
and have fun with the home