3(2a-9)+7=4(a-6)-12

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Solution for 3(2a-9)+7=4(a-6)-12 equation:


Simplifying
3(2a + -9) + 7 = 4(a + -6) + -12

Reorder the terms:
3(-9 + 2a) + 7 = 4(a + -6) + -12
(-9 * 3 + 2a * 3) + 7 = 4(a + -6) + -12
(-27 + 6a) + 7 = 4(a + -6) + -12

Reorder the terms:
-27 + 7 + 6a = 4(a + -6) + -12

Combine like terms: -27 + 7 = -20
-20 + 6a = 4(a + -6) + -12

Reorder the terms:
-20 + 6a = 4(-6 + a) + -12
-20 + 6a = (-6 * 4 + a * 4) + -12
-20 + 6a = (-24 + 4a) + -12

Reorder the terms:
-20 + 6a = -24 + -12 + 4a

Combine like terms: -24 + -12 = -36
-20 + 6a = -36 + 4a

Solving
-20 + 6a = -36 + 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.
-20 + 6a + -4a = -36 + 4a + -4a

Combine like terms: 6a + -4a = 2a
-20 + 2a = -36 + 4a + -4a

Combine like terms: 4a + -4a = 0
-20 + 2a = -36 + 0
-20 + 2a = -36

Add '20' to each side of the equation.
-20 + 20 + 2a = -36 + 20

Combine like terms: -20 + 20 = 0
0 + 2a = -36 + 20
2a = -36 + 20

Combine like terms: -36 + 20 = -16
2a = -16

Divide each side by '2'.
a = -8

Simplifying
a = -8

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