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

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


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

Reorder the terms:
7(9 + a) + -7 = 8a + -9
(9 * 7 + a * 7) + -7 = 8a + -9
(63 + 7a) + -7 = 8a + -9

Reorder the terms:
63 + -7 + 7a = 8a + -9

Combine like terms: 63 + -7 = 56
56 + 7a = 8a + -9

Reorder the terms:
56 + 7a = -9 + 8a

Solving
56 + 7a = -9 + 8a

Solving for variable 'a'.

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

Add '-8a' to each side of the equation.
56 + 7a + -8a = -9 + 8a + -8a

Combine like terms: 7a + -8a = -1a
56 + -1a = -9 + 8a + -8a

Combine like terms: 8a + -8a = 0
56 + -1a = -9 + 0
56 + -1a = -9

Add '-56' to each side of the equation.
56 + -56 + -1a = -9 + -56

Combine like terms: 56 + -56 = 0
0 + -1a = -9 + -56
-1a = -9 + -56

Combine like terms: -9 + -56 = -65
-1a = -65

Divide each side by '-1'.
a = 65

Simplifying
a = 65

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