5x+21=3x-18

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Solution for 5x+21=3x-18 equation: 



5x+21=3x-18

We move all terms to the left:

5x+21-(3x-18)=0

We get rid of parentheses

5x-3x+18+21=0

We add all the numbers together, and all the variables

2x+39=0

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

2x=-39

x=-39/2

x=-19+1/2

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