6(a-7)+9=3(a-7)

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


Simplifying
6(a + -7) + 9 = 3(a + -7)

Reorder the terms:
6(-7 + a) + 9 = 3(a + -7)
(-7 * 6 + a * 6) + 9 = 3(a + -7)
(-42 + 6a) + 9 = 3(a + -7)

Reorder the terms:
-42 + 9 + 6a = 3(a + -7)

Combine like terms: -42 + 9 = -33
-33 + 6a = 3(a + -7)

Reorder the terms:
-33 + 6a = 3(-7 + a)
-33 + 6a = (-7 * 3 + a * 3)
-33 + 6a = (-21 + 3a)

Solving
-33 + 6a = -21 + 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.
-33 + 6a + -3a = -21 + 3a + -3a

Combine like terms: 6a + -3a = 3a
-33 + 3a = -21 + 3a + -3a

Combine like terms: 3a + -3a = 0
-33 + 3a = -21 + 0
-33 + 3a = -21

Add '33' to each side of the equation.
-33 + 33 + 3a = -21 + 33

Combine like terms: -33 + 33 = 0
0 + 3a = -21 + 33
3a = -21 + 33

Combine like terms: -21 + 33 = 12
3a = 12

Divide each side by '3'.
a = 4

Simplifying
a = 4

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