18(x+8)=21

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Solution for 18(x+8)=21 equation: 



18(x+8)=21

We move all terms to the left:

18(x+8)-(21)=0

We multiply parentheses

18x+144-21=0

We add all the numbers together, and all the variables

18x+123=0

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

18x=-123

x=-123/18

x=-6+5/6

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