-10a+9=2a-15

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Solution for -10a+9=2a-15 equation:


Simplifying
-10a + 9 = 2a + -15

Reorder the terms:
9 + -10a = 2a + -15

Reorder the terms:
9 + -10a = -15 + 2a

Solving
9 + -10a = -15 + 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 + -10a + -2a = -15 + 2a + -2a

Combine like terms: -10a + -2a = -12a
9 + -12a = -15 + 2a + -2a

Combine like terms: 2a + -2a = 0
9 + -12a = -15 + 0
9 + -12a = -15

Add '-9' to each side of the equation.
9 + -9 + -12a = -15 + -9

Combine like terms: 9 + -9 = 0
0 + -12a = -15 + -9
-12a = -15 + -9

Combine like terms: -15 + -9 = -24
-12a = -24

Divide each side by '-12'.
a = 2

Simplifying
a = 2

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