3a-(-12a)-15a+27=

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Solution for 3a-(-12a)-15a+27= equation:


Simplifying
3a + -1(-12a) + -15a + 27 = 0

Remove parenthesis around (-12a)
3a + -1 * -12a + -15a + 27 = 0

Multiply -1 * -12
3a + 12a + -15a + 27 = 0

Reorder the terms:
27 + 3a + 12a + -15a = 0

Combine like terms: 3a + 12a = 15a
27 + 15a + -15a = 0

Combine like terms: 15a + -15a = 0
27 + 0 = 0
27 = 0

Solving
27 = 0

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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