3[a-10]=12

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Solution for 3[a-10]=12 equation: 


Simplifying
3[a + -10] = 12

Reorder the terms:
3[-10 + a] = 12
[-10 * 3 + a * 3] = 12
[-30 + 3a] = 12

Solving
-30 + 3a = 12

Solving for variable 'a'.

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

Add '30' to each side of the equation.
-30 + 30 + 3a = 12 + 30

Combine like terms: -30 + 30 = 0
0 + 3a = 12 + 30
3a = 12 + 30

Combine like terms: 12 + 30 = 42
3a = 42

Divide each side by '3'.
a = 14

Simplifying
a = 14

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