3(a-1)-9(a-2)=-4(2a+1)-3

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Solution for 3(a-1)-9(a-2)=-4(2a+1)-3 equation:


Simplifying
3(a + -1) + -9(a + -2) = -4(2a + 1) + -3

Reorder the terms:
3(-1 + a) + -9(a + -2) = -4(2a + 1) + -3
(-1 * 3 + a * 3) + -9(a + -2) = -4(2a + 1) + -3
(-3 + 3a) + -9(a + -2) = -4(2a + 1) + -3

Reorder the terms:
-3 + 3a + -9(-2 + a) = -4(2a + 1) + -3
-3 + 3a + (-2 * -9 + a * -9) = -4(2a + 1) + -3
-3 + 3a + (18 + -9a) = -4(2a + 1) + -3

Reorder the terms:
-3 + 18 + 3a + -9a = -4(2a + 1) + -3

Combine like terms: -3 + 18 = 15
15 + 3a + -9a = -4(2a + 1) + -3

Combine like terms: 3a + -9a = -6a
15 + -6a = -4(2a + 1) + -3

Reorder the terms:
15 + -6a = -4(1 + 2a) + -3
15 + -6a = (1 * -4 + 2a * -4) + -3
15 + -6a = (-4 + -8a) + -3

Reorder the terms:
15 + -6a = -4 + -3 + -8a

Combine like terms: -4 + -3 = -7
15 + -6a = -7 + -8a

Solving
15 + -6a = -7 + -8a

Solving for variable 'a'.

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

Add '8a' to each side of the equation.
15 + -6a + 8a = -7 + -8a + 8a

Combine like terms: -6a + 8a = 2a
15 + 2a = -7 + -8a + 8a

Combine like terms: -8a + 8a = 0
15 + 2a = -7 + 0
15 + 2a = -7

Add '-15' to each side of the equation.
15 + -15 + 2a = -7 + -15

Combine like terms: 15 + -15 = 0
0 + 2a = -7 + -15
2a = -7 + -15

Combine like terms: -7 + -15 = -22
2a = -22

Divide each side by '2'.
a = -11

Simplifying
a = -11

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