x=4(90-x)-55

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Solution for x=4(90-x)-55 equation: 



x=4(90-x)-55

We move all terms to the left:

x-(4(90-x)-55)=0

We add all the numbers together, and all the variables

x-(4(-1x+90)-55)=0



We calculate terms in parentheses: -(4(-1x+90)-55), so:

4(-1x+90)-55

We multiply parentheses

-4x+360-55

We add all the numbers together, and all the variables

-4x+305

Back to the equation:

-(-4x+305)



We get rid of parentheses

x+4x-305=0

We add all the numbers together, and all the variables

5x-305=0

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

5x=305

x=305/5

x=61

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