15a-9(a+1)=2(a-5)

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Solution for 15a-9(a+1)=2(a-5) equation:


Simplifying
15a + -9(a + 1) = 2(a + -5)

Reorder the terms:
15a + -9(1 + a) = 2(a + -5)
15a + (1 * -9 + a * -9) = 2(a + -5)
15a + (-9 + -9a) = 2(a + -5)

Reorder the terms:
-9 + 15a + -9a = 2(a + -5)

Combine like terms: 15a + -9a = 6a
-9 + 6a = 2(a + -5)

Reorder the terms:
-9 + 6a = 2(-5 + a)
-9 + 6a = (-5 * 2 + a * 2)
-9 + 6a = (-10 + 2a)

Solving
-9 + 6a = -10 + 2a

Solving for variable 'a'.

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

Add '-2a' to each side of the equation.
-9 + 6a + -2a = -10 + 2a + -2a

Combine like terms: 6a + -2a = 4a
-9 + 4a = -10 + 2a + -2a

Combine like terms: 2a + -2a = 0
-9 + 4a = -10 + 0
-9 + 4a = -10

Add '9' to each side of the equation.
-9 + 9 + 4a = -10 + 9

Combine like terms: -9 + 9 = 0
0 + 4a = -10 + 9
4a = -10 + 9

Combine like terms: -10 + 9 = -1
4a = -1

Divide each side by '4'.
a = -0.25

Simplifying
a = -0.25

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