2a+3(a-1)=12

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Solution for 2a+3(a-1)=12 equation:


Simplifying
2a + 3(a + -1) = 12

Reorder the terms:
2a + 3(-1 + a) = 12
2a + (-1 * 3 + a * 3) = 12
2a + (-3 + 3a) = 12

Reorder the terms:
-3 + 2a + 3a = 12

Combine like terms: 2a + 3a = 5a
-3 + 5a = 12

Solving
-3 + 5a = 12

Solving for variable 'a'.

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

Add '3' to each side of the equation.
-3 + 3 + 5a = 12 + 3

Combine like terms: -3 + 3 = 0
0 + 5a = 12 + 3
5a = 12 + 3

Combine like terms: 12 + 3 = 15
5a = 15

Divide each side by '5'.
a = 3

Simplifying
a = 3

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