a-7=8-(9+a)

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


Simplifying
a + -7 = 8 + -1(9 + a)

Reorder the terms:
-7 + a = 8 + -1(9 + a)
-7 + a = 8 + (9 * -1 + a * -1)
-7 + a = 8 + (-9 + -1a)

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

Solving
-7 + a = -1 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
-7 + a + a = -1 + -1a + a

Combine like terms: a + a = 2a
-7 + 2a = -1 + -1a + a

Combine like terms: -1a + a = 0
-7 + 2a = -1 + 0
-7 + 2a = -1

Add '7' to each side of the equation.
-7 + 7 + 2a = -1 + 7

Combine like terms: -7 + 7 = 0
0 + 2a = -1 + 7
2a = -1 + 7

Combine like terms: -1 + 7 = 6
2a = 6

Divide each side by '2'.
a = 3

Simplifying
a = 3

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