(15a-7a+1)-(8a+a+8)=

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Solution for (15a-7a+1)-(8a+a+8)= equation:


Simplifying
(15a + -7a + 1) + -1(8a + a + 8) = 0

Reorder the terms:
(1 + 15a + -7a) + -1(8a + a + 8) = 0

Combine like terms: 15a + -7a = 8a
(1 + 8a) + -1(8a + a + 8) = 0

Remove parenthesis around (1 + 8a)
1 + 8a + -1(8a + a + 8) = 0

Reorder the terms:
1 + 8a + -1(8 + 8a + a) = 0

Combine like terms: 8a + a = 9a
1 + 8a + -1(8 + 9a) = 0
1 + 8a + (8 * -1 + 9a * -1) = 0
1 + 8a + (-8 + -9a) = 0

Reorder the terms:
1 + -8 + 8a + -9a = 0

Combine like terms: 1 + -8 = -7
-7 + 8a + -9a = 0

Combine like terms: 8a + -9a = -1a
-7 + -1a = 0

Solving
-7 + -1a = 0

Solving for variable 'a'.

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

Add '7' to each side of the equation.
-7 + 7 + -1a = 0 + 7

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

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

Divide each side by '-1'.
a = -7

Simplifying
a = -7

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