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

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


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

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

Remove parenthesis around (-8 + a)
a + -8 + a = (a + -9) + -1(a + 7)

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

Combine like terms: a + a = 2a
-8 + 2a = (a + -9) + -1(a + 7)

Reorder the terms:
-8 + 2a = (-9 + a) + -1(a + 7)

Remove parenthesis around (-9 + a)
-8 + 2a = -9 + a + -1(a + 7)

Reorder the terms:
-8 + 2a = -9 + a + -1(7 + a)
-8 + 2a = -9 + a + (7 * -1 + a * -1)
-8 + 2a = -9 + a + (-7 + -1a)

Reorder the terms:
-8 + 2a = -9 + -7 + a + -1a

Combine like terms: -9 + -7 = -16
-8 + 2a = -16 + a + -1a

Combine like terms: a + -1a = 0
-8 + 2a = -16 + 0
-8 + 2a = -16

Solving
-8 + 2a = -16

Solving for variable 'a'.

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

Add '8' to each side of the equation.
-8 + 8 + 2a = -16 + 8

Combine like terms: -8 + 8 = 0
0 + 2a = -16 + 8
2a = -16 + 8

Combine like terms: -16 + 8 = -8
2a = -8

Divide each side by '2'.
a = -4

Simplifying
a = -4

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