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45(2-x)=90
We move all terms to the left:
45(2-x)-(90)=0
We add all the numbers together, and all the variables
45(-1x+2)-90=0
We multiply parentheses
-45x+90-90=0
We add all the numbers together, and all the variables
-45x=0
x=0/-45
x=0
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