5(x+-90)=2(x+-90)+21

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Solution for 5(x+-90)=2(x+-90)+21 equation: 



5(x+-90)=2(x+-90)+21

We move all terms to the left:

5(x+-90)-(2(x+-90)+21)=0

We add all the numbers together, and all the variables

5(x-90)-(2(x-90)+21)=0

We multiply parentheses

5x-(2(x-90)+21)-450=0



We calculate terms in parentheses: -(2(x-90)+21), so:

2(x-90)+21

We multiply parentheses

2x-180+21

We add all the numbers together, and all the variables

2x-159

Back to the equation:

-(2x-159)



We get rid of parentheses

5x-2x+159-450=0

We add all the numbers together, and all the variables

3x-291=0

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

3x=291

x=291/3

x=97

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