(8+c)3-(9+2c)5=-42

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Solution for (8+c)3-(9+2c)5=-42 equation: 



(8+c)3-(9+2c)5=-42

We move all terms to the left:

(8+c)3-(9+2c)5-(-42)=0

We add all the numbers together, and all the variables

(c+8)3-(2c+9)5-(-42)=0

We add all the numbers together, and all the variables

(c+8)3-(2c+9)5+42=0

We multiply parentheses

3c-10c+24-45+42=0

We add all the numbers together, and all the variables

-7c+21=0

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

-7c=-21

c=-21/-7

c=+3

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