90-3x+180-7x-((90-3x)-(180-7x))=180

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Solution for 90-3x+180-7x-((90-3x)-(180-7x))=180 equation:



90-3x+180-7x-((90-3x)-(180-7x))=180
We move all terms to the left:
90-3x+180-7x-((90-3x)-(180-7x))-(180)=0
We add all the numbers together, and all the variables
-3x-7x-((-3x+90)-(-7x+180))+90+180-180=0
We add all the numbers together, and all the variables
-10x-((-3x+90)-(-7x+180))+90=0
We calculate terms in parentheses: -((-3x+90)-(-7x+180)), so:
(-3x+90)-(-7x+180)
We get rid of parentheses
-3x+7x+90-180
We add all the numbers together, and all the variables
4x-90
Back to the equation:
-(4x-90)
We get rid of parentheses
-10x-4x+90+90=0
We add all the numbers together, and all the variables
-14x+180=0
We move all terms containing x to the left, all other terms to the right
-14x=-180
x=-180/-14
x=12+6/7

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