7x+3(-5x+21)=-3

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Solution for 7x+3(-5x+21)=-3 equation: 



7x+3(-5x+21)=-3

We move all terms to the left:

7x+3(-5x+21)-(-3)=0

We add all the numbers together, and all the variables

7x+3(-5x+21)+3=0

We multiply parentheses

7x-15x+63+3=0

We add all the numbers together, and all the variables

-8x+66=0

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

-8x=-66

x=-66/-8

x=8+1/4

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