6(-15)+3-(-15)=-20+5(-15)-7

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Solution for 6(-15)+3-(-15)=-20+5(-15)-7 equation: 


Simplifying
6(-15) + 3 + -1(-15) = -20 + 5(-15) + -7

Multiply 6 * -15
-90 + 3 + -1(-15) = -20 + 5(-15) + -7

Multiply -1 * -15
-90 + 3 + 15 = -20 + 5(-15) + -7

Combine like terms: -90 + 3 = -87
-87 + 15 = -20 + 5(-15) + -7

Combine like terms: -87 + 15 = -72
-72 = -20 + 5(-15) + -7

Multiply 5 * -15
-72 = -20 + -75 + -7

Combine like terms: -20 + -75 = -95
-72 = -95 + -7

Combine like terms: -95 + -7 = -102
-72 = -102

Solving
-72 = -102

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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