-7(-4)-5(5-3(-4))=6((-4)-4)-9

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Solution for -7(-4)-5(5-3(-4))=6((-4)-4)-9 equation: 


Simplifying
-7(-4) + -5(5 + -3(-4)) = 6((-4) + -4) + -9

Multiply -7 * -4
28 + -5(5 + -3(-4)) = 6((-4) + -4) + -9

Multiply -3 * -4
28 + -5(5 + 12) = 6((-4) + -4) + -9

Combine like terms: 5 + 12 = 17
28 + -5(17) = 6((-4) + -4) + -9

Multiply -5 * 17
28 + -85 = 6((-4) + -4) + -9

Combine like terms: 28 + -85 = -57
-57 = 6((-4) + -4) + -9
-57 = 6(-4 + -4) + -9

Combine like terms: -4 + -4 = -8
-57 = 6(-8) + -9

Multiply 6 * -8
-57 = -48 + -9

Combine like terms: -48 + -9 = -57
-57 = -57

Add '57' to each side of the equation.
-57 + 57 = -57 + 57

Combine like terms: -57 + 57 = 0
0 = -57 + 57

Combine like terms: -57 + 57 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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