7a-(3a-8)=12

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Solution for 7a-(3a-8)=12 equation:


Simplifying
7a + -1(3a + -8) = 12

Reorder the terms:
7a + -1(-8 + 3a) = 12
7a + (-8 * -1 + 3a * -1) = 12
7a + (8 + -3a) = 12

Reorder the terms:
8 + 7a + -3a = 12

Combine like terms: 7a + -3a = 4a
8 + 4a = 12

Solving
8 + 4a = 12

Solving for variable 'a'.

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

Add '-8' to each side of the equation.
8 + -8 + 4a = 12 + -8

Combine like terms: 8 + -8 = 0
0 + 4a = 12 + -8
4a = 12 + -8

Combine like terms: 12 + -8 = 4
4a = 4

Divide each side by '4'.
a = 1

Simplifying
a = 1

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