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

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Solution for 4x-(-4x)+7=21 equation: 



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

4x-(-4x)-14=0

We get rid of parentheses

4x+4x-14=0

We add all the numbers together, and all the variables

8x-14=0

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

8x=14

x=14/8

x=1+3/4

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