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2x+7(22.5-1.5x)=-45
We move all terms to the left:
2x+7(22.5-1.5x)-(-45)=0
We add all the numbers together, and all the variables
2x+7(-1.5x+22.5)-(-45)=0
We add all the numbers together, and all the variables
2x+7(-1.5x+22.5)+45=0
We multiply parentheses
2x-7x+157.5+45=0
We add all the numbers together, and all the variables
-5x+202.5=0
We move all terms containing x to the left, all other terms to the right
-5x=-202.5
x=-202.5/-5
x=40+2.5/5
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