7x+21=-2,x+3

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Solution for 7x+21=-2,x+3 equation:



7x+21=-2.x+3
We move all terms to the left:
7x+21-(-2.x+3)=0
We add all the numbers together, and all the variables
7x-(-2x+3)+21=0
We get rid of parentheses
7x+2x-3+21=0
We add all the numbers together, and all the variables
9x+18=0
We move all terms containing x to the left, all other terms to the right
9x=-18
x=-18/9
x=-2

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