10-2(a-1)=6+9

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Solution for 10-2(a-1)=6+9 equation:


Simplifying
10 + -2(a + -1) = 6 + 9

Reorder the terms:
10 + -2(-1 + a) = 6 + 9
10 + (-1 * -2 + a * -2) = 6 + 9
10 + (2 + -2a) = 6 + 9

Combine like terms: 10 + 2 = 12
12 + -2a = 6 + 9

Combine like terms: 6 + 9 = 15
12 + -2a = 15

Solving
12 + -2a = 15

Solving for variable 'a'.

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

Add '-12' to each side of the equation.
12 + -12 + -2a = 15 + -12

Combine like terms: 12 + -12 = 0
0 + -2a = 15 + -12
-2a = 15 + -12

Combine like terms: 15 + -12 = 3
-2a = 3

Divide each side by '-2'.
a = -1.5

Simplifying
a = -1.5

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