3(7+4a)+6(-1-8a)=51

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Solution for 3(7+4a)+6(-1-8a)=51 equation:


Simplifying
3(7 + 4a) + 6(-1 + -8a) = 51
(7 * 3 + 4a * 3) + 6(-1 + -8a) = 51
(21 + 12a) + 6(-1 + -8a) = 51
21 + 12a + (-1 * 6 + -8a * 6) = 51
21 + 12a + (-6 + -48a) = 51

Reorder the terms:
21 + -6 + 12a + -48a = 51

Combine like terms: 21 + -6 = 15
15 + 12a + -48a = 51

Combine like terms: 12a + -48a = -36a
15 + -36a = 51

Solving
15 + -36a = 51

Solving for variable 'a'.

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

Add '-15' to each side of the equation.
15 + -15 + -36a = 51 + -15

Combine like terms: 15 + -15 = 0
0 + -36a = 51 + -15
-36a = 51 + -15

Combine like terms: 51 + -15 = 36
-36a = 36

Divide each side by '-36'.
a = -1

Simplifying
a = -1

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