x=3(90-x)+10

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Solution for x=3(90-x)+10 equation: 



x=3(90-x)+10

We move all terms to the left:

x-(3(90-x)+10)=0

We add all the numbers together, and all the variables

x-(3(-1x+90)+10)=0



We calculate terms in parentheses: -(3(-1x+90)+10), so:

3(-1x+90)+10

We multiply parentheses

-3x+270+10

We add all the numbers together, and all the variables

-3x+280

Back to the equation:

-(-3x+280)



We get rid of parentheses

x+3x-280=0

We add all the numbers together, and all the variables

4x-280=0

We move all terms containing x to the left, all other terms to the right

4x=280

x=280/4

x=70

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