7a-9=12(a-5)

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Solution for 7a-9=12(a-5) equation:


Simplifying
7a + -9 = 12(a + -5)

Reorder the terms:
-9 + 7a = 12(a + -5)

Reorder the terms:
-9 + 7a = 12(-5 + a)
-9 + 7a = (-5 * 12 + a * 12)
-9 + 7a = (-60 + 12a)

Solving
-9 + 7a = -60 + 12a

Solving for variable 'a'.

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

Add '-12a' to each side of the equation.
-9 + 7a + -12a = -60 + 12a + -12a

Combine like terms: 7a + -12a = -5a
-9 + -5a = -60 + 12a + -12a

Combine like terms: 12a + -12a = 0
-9 + -5a = -60 + 0
-9 + -5a = -60

Add '9' to each side of the equation.
-9 + 9 + -5a = -60 + 9

Combine like terms: -9 + 9 = 0
0 + -5a = -60 + 9
-5a = -60 + 9

Combine like terms: -60 + 9 = -51
-5a = -51

Divide each side by '-5'.
a = 10.2

Simplifying
a = 10.2

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