90+0.40x-0.40x=40+0.90x-0.40x

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Solution for 90+0.40x-0.40x=40+0.90x-0.40x equation:



90+0.40x-0.40x=40+0.90x-0.40x
We move all terms to the left:
90+0.40x-0.40x-(40+0.90x-0.40x)=0
We add all the numbers together, and all the variables
0.40x-0.40x-(0.5x+40)+90=0
We add all the numbers together, and all the variables
-(0.5x+40)+90=0
We get rid of parentheses
-0.5x-40+90=0
We add all the numbers together, and all the variables
-0.5x+50=0
We move all terms containing x to the left, all other terms to the right
-0.5x=-50
x=-50/-0.5
x=+100

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