4x+21=2x-5

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Solution for 4x+21=2x-5 equation: 



4x+21=2x-5

We move all terms to the left:

4x+21-(2x-5)=0

We get rid of parentheses

4x-2x+5+21=0

We add all the numbers together, and all the variables

2x+26=0

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

2x=-26

x=-26/2

x=-13

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