21-4x=-71-7x

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Solution for 21-4x=-71-7x equation: 



21-4x=-71-7x

We move all terms to the left:

21-4x-(-71-7x)=0

We add all the numbers together, and all the variables

-4x-(-7x-71)+21=0

We get rid of parentheses

-4x+7x+71+21=0

We add all the numbers together, and all the variables

3x+92=0

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

3x=-92

x=-92/3

x=-30+2/3

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