8x-7=4x=21

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Solution for 8x-7=4x=21 equation: 



8x-7=4x=21

We move all terms to the left:

8x-7-(4x)=0

We add all the numbers together, and all the variables

4x-7=0

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

4x=7

x=7/4

x=1+3/4

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