8a-9=3-7(a+6)

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Solution for 8a-9=3-7(a+6) equation:


Simplifying
8a + -9 = 3 + -7(a + 6)

Reorder the terms:
-9 + 8a = 3 + -7(a + 6)

Reorder the terms:
-9 + 8a = 3 + -7(6 + a)
-9 + 8a = 3 + (6 * -7 + a * -7)
-9 + 8a = 3 + (-42 + -7a)

Combine like terms: 3 + -42 = -39
-9 + 8a = -39 + -7a

Solving
-9 + 8a = -39 + -7a

Solving for variable 'a'.

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

Add '7a' to each side of the equation.
-9 + 8a + 7a = -39 + -7a + 7a

Combine like terms: 8a + 7a = 15a
-9 + 15a = -39 + -7a + 7a

Combine like terms: -7a + 7a = 0
-9 + 15a = -39 + 0
-9 + 15a = -39

Add '9' to each side of the equation.
-9 + 9 + 15a = -39 + 9

Combine like terms: -9 + 9 = 0
0 + 15a = -39 + 9
15a = -39 + 9

Combine like terms: -39 + 9 = -30
15a = -30

Divide each side by '15'.
a = -2

Simplifying
a = -2

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