78=-7(x-10)+15

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Solution for 78=-7(x-10)+15 equation: 



78=-7(x-10)+15

We move all terms to the left:

78-(-7(x-10)+15)=0



We calculate terms in parentheses: -(-7(x-10)+15), so:

-7(x-10)+15

We multiply parentheses

-7x+70+15

We add all the numbers together, and all the variables

-7x+85

Back to the equation:

-(-7x+85)



We get rid of parentheses

7x-85+78=0

We add all the numbers together, and all the variables

7x-7=0

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

7x=7

x=7/7

x=1

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