3[2a-7]=3a+12

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Solution for 3[2a-7]=3a+12 equation:


Simplifying
3[2a + -7] = 3a + 12

Reorder the terms:
3[-7 + 2a] = 3a + 12
[-7 * 3 + 2a * 3] = 3a + 12
[-21 + 6a] = 3a + 12

Reorder the terms:
-21 + 6a = 12 + 3a

Solving
-21 + 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.
-21 + 6a + -3a = 12 + 3a + -3a

Combine like terms: 6a + -3a = 3a
-21 + 3a = 12 + 3a + -3a

Combine like terms: 3a + -3a = 0
-21 + 3a = 12 + 0
-21 + 3a = 12

Add '21' to each side of the equation.
-21 + 21 + 3a = 12 + 21

Combine like terms: -21 + 21 = 0
0 + 3a = 12 + 21
3a = 12 + 21

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

Divide each side by '3'.
a = 11

Simplifying
a = 11

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