-a-(-2)(a+5)=-4a+15

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Solution for -a-(-2)(a+5)=-4a+15 equation:


Simplifying
-1a + -1(-2)(a + 5) = -4a + 15

Reorder the terms:
-1a + -1 * -2(5 + a) = -4a + 15

Multiply -1 * -2
-1a + 2(5 + a) = -4a + 15
-1a + (5 * 2 + a * 2) = -4a + 15
-1a + (10 + 2a) = -4a + 15

Reorder the terms:
10 + -1a + 2a = -4a + 15

Combine like terms: -1a + 2a = 1a
10 + 1a = -4a + 15

Reorder the terms:
10 + 1a = 15 + -4a

Solving
10 + 1a = 15 + -4a

Solving for variable 'a'.

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

Add '4a' to each side of the equation.
10 + 1a + 4a = 15 + -4a + 4a

Combine like terms: 1a + 4a = 5a
10 + 5a = 15 + -4a + 4a

Combine like terms: -4a + 4a = 0
10 + 5a = 15 + 0
10 + 5a = 15

Add '-10' to each side of the equation.
10 + -10 + 5a = 15 + -10

Combine like terms: 10 + -10 = 0
0 + 5a = 15 + -10
5a = 15 + -10

Combine like terms: 15 + -10 = 5
5a = 5

Divide each side by '5'.
a = 1

Simplifying
a = 1

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