8x+(-4)=21+3x

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Solution for 8x+(-4)=21+3x equation: 



8x+(-4)=21+3x

We move all terms to the left:

8x+(-4)-(21+3x)=0

We add all the numbers together, and all the variables

8x-(3x+21)+(-4)=0

We add all the numbers together, and all the variables

8x-(3x+21)-4=0

We get rid of parentheses

8x-3x-21-4=0

We add all the numbers together, and all the variables

5x-25=0

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

5x=25

x=25/5

x=5

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