6(a-8)+21=3(a-4)

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Solution for 6(a-8)+21=3(a-4) equation:


Simplifying
6(a + -8) + 21 = 3(a + -4)

Reorder the terms:
6(-8 + a) + 21 = 3(a + -4)
(-8 * 6 + a * 6) + 21 = 3(a + -4)
(-48 + 6a) + 21 = 3(a + -4)

Reorder the terms:
-48 + 21 + 6a = 3(a + -4)

Combine like terms: -48 + 21 = -27
-27 + 6a = 3(a + -4)

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

Solving
-27 + 6a = -12 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
-27 + 6a + -3a = -12 + 3a + -3a

Combine like terms: 6a + -3a = 3a
-27 + 3a = -12 + 3a + -3a

Combine like terms: 3a + -3a = 0
-27 + 3a = -12 + 0
-27 + 3a = -12

Add '27' to each side of the equation.
-27 + 27 + 3a = -12 + 27

Combine like terms: -27 + 27 = 0
0 + 3a = -12 + 27
3a = -12 + 27

Combine like terms: -12 + 27 = 15
3a = 15

Divide each side by '3'.
a = 5

Simplifying
a = 5

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