4(2x+5)+9=21

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Solution for 4(2x+5)+9=21 equation: 



4(2x+5)+9=21

We move all terms to the left:

4(2x+5)+9-(21)=0

We add all the numbers together, and all the variables

4(2x+5)-12=0

We multiply parentheses

8x+20-12=0

We add all the numbers together, and all the variables

8x+8=0

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

8x=-8

x=-8/8

x=-1

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