(40+0.70x)=0.90x

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Solution for (40+0.70x)=0.90x equation:



(40+0.70x)=0.90x
We move all terms to the left:
(40+0.70x)-(0.90x)=0
We add all the numbers together, and all the variables
(0.70x+40)-(+0.90x)=0
We get rid of parentheses
0.70x-0.90x+40=0
We add all the numbers together, and all the variables
-0.2x+40=0
We move all terms containing x to the left, all other terms to the right
-0.2x=-40
x=-40/-0.2
x=+200

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