(15x+21)3=5x+7

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Solution for (15x+21)3=5x+7 equation: 



(15x+21)3=5x+7

We move all terms to the left:

(15x+21)3-(5x+7)=0

We multiply parentheses

45x-(5x+7)+63=0

We get rid of parentheses

45x-5x-7+63=0

We add all the numbers together, and all the variables

40x+56=0

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

40x=-56

x=-56/40

x=-1+2/5

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