-15x-7=21x-7(6x-7)+-

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Solution for -15x-7=21x-7(6x-7)+- equation: 



-15x-7=21x-7(6x-7)+-

We move all terms to the left:

-15x-7-(21x-7(6x-7)+-)=0

We use the square of the difference formula

-15x-(21x-7(6x-7)-)-7=0



We calculate terms in parentheses: -(21x-7(6x-7)-), so:

21x-7(6x-7)-

We add all the numbers together, and all the variables

21x-7(6x-7)

We multiply parentheses

21x-42x+49

We add all the numbers together, and all the variables

-21x+49

Back to the equation:

-(-21x+49)



We get rid of parentheses

-15x+21x-49-7=0

We add all the numbers together, and all the variables

6x-56=0

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

6x=56

x=56/6

x=9+1/3

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