7(4a-3)-(2a+1)9=2(a-9)

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Solution for 7(4a-3)-(2a+1)9=2(a-9) equation:


Simplifying
7(4a + -3) + -1(2a + 1) * 9 = 2(a + -9)

Reorder the terms:
7(-3 + 4a) + -1(2a + 1) * 9 = 2(a + -9)
(-3 * 7 + 4a * 7) + -1(2a + 1) * 9 = 2(a + -9)
(-21 + 28a) + -1(2a + 1) * 9 = 2(a + -9)

Reorder the terms:
-21 + 28a + -1(1 + 2a) * 9 = 2(a + -9)

Reorder the terms for easier multiplication:
-21 + 28a + -1 * 9(1 + 2a) = 2(a + -9)

Multiply -1 * 9
-21 + 28a + -9(1 + 2a) = 2(a + -9)
-21 + 28a + (1 * -9 + 2a * -9) = 2(a + -9)
-21 + 28a + (-9 + -18a) = 2(a + -9)

Reorder the terms:
-21 + -9 + 28a + -18a = 2(a + -9)

Combine like terms: -21 + -9 = -30
-30 + 28a + -18a = 2(a + -9)

Combine like terms: 28a + -18a = 10a
-30 + 10a = 2(a + -9)

Reorder the terms:
-30 + 10a = 2(-9 + a)
-30 + 10a = (-9 * 2 + a * 2)
-30 + 10a = (-18 + 2a)

Solving
-30 + 10a = -18 + 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.
-30 + 10a + -2a = -18 + 2a + -2a

Combine like terms: 10a + -2a = 8a
-30 + 8a = -18 + 2a + -2a

Combine like terms: 2a + -2a = 0
-30 + 8a = -18 + 0
-30 + 8a = -18

Add '30' to each side of the equation.
-30 + 30 + 8a = -18 + 30

Combine like terms: -30 + 30 = 0
0 + 8a = -18 + 30
8a = -18 + 30

Combine like terms: -18 + 30 = 12
8a = 12

Divide each side by '8'.
a = 1.5

Simplifying
a = 1.5

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