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

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


Simplifying
6(a + 7) + -3(a + -8) = 51

Reorder the terms:
6(7 + a) + -3(a + -8) = 51
(7 * 6 + a * 6) + -3(a + -8) = 51
(42 + 6a) + -3(a + -8) = 51

Reorder the terms:
42 + 6a + -3(-8 + a) = 51
42 + 6a + (-8 * -3 + a * -3) = 51
42 + 6a + (24 + -3a) = 51

Reorder the terms:
42 + 24 + 6a + -3a = 51

Combine like terms: 42 + 24 = 66
66 + 6a + -3a = 51

Combine like terms: 6a + -3a = 3a
66 + 3a = 51

Solving
66 + 3a = 51

Solving for variable 'a'.

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

Add '-66' to each side of the equation.
66 + -66 + 3a = 51 + -66

Combine like terms: 66 + -66 = 0
0 + 3a = 51 + -66
3a = 51 + -66

Combine like terms: 51 + -66 = -15
3a = -15

Divide each side by '3'.
a = -5

Simplifying
a = -5

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