78=-3(4a+6)-7(4a-8)

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Solution for 78=-3(4a+6)-7(4a-8) equation:


Simplifying
78 = -3(4a + 6) + -7(4a + -8)

Reorder the terms:
78 = -3(6 + 4a) + -7(4a + -8)
78 = (6 * -3 + 4a * -3) + -7(4a + -8)
78 = (-18 + -12a) + -7(4a + -8)

Reorder the terms:
78 = -18 + -12a + -7(-8 + 4a)
78 = -18 + -12a + (-8 * -7 + 4a * -7)
78 = -18 + -12a + (56 + -28a)

Reorder the terms:
78 = -18 + 56 + -12a + -28a

Combine like terms: -18 + 56 = 38
78 = 38 + -12a + -28a

Combine like terms: -12a + -28a = -40a
78 = 38 + -40a

Solving
78 = 38 + -40a

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '40a' to each side of the equation.
78 + 40a = 38 + -40a + 40a

Combine like terms: -40a + 40a = 0
78 + 40a = 38 + 0
78 + 40a = 38

Add '-78' to each side of the equation.
78 + -78 + 40a = 38 + -78

Combine like terms: 78 + -78 = 0
0 + 40a = 38 + -78
40a = 38 + -78

Combine like terms: 38 + -78 = -40
40a = -40

Divide each side by '40'.
a = -1

Simplifying
a = -1

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