7x-7-6x-6=3x-21

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Solution for 7x-7-6x-6=3x-21 equation:



7x-7-6x-6=3x-21
We move all terms to the left:
7x-7-6x-6-(3x-21)=0
We add all the numbers together, and all the variables
x-(3x-21)-13=0
We get rid of parentheses
x-3x+21-13=0
We add all the numbers together, and all the variables
-2x+8=0
We move all terms containing x to the left, all other terms to the right
-2x=-8
x=-8/-2
x=+4

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