-3a+4(a-2)=13

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Solution for -3a+4(a-2)=13 equation:


Simplifying
-3a + 4(a + -2) = 13

Reorder the terms:
-3a + 4(-2 + a) = 13
-3a + (-2 * 4 + a * 4) = 13
-3a + (-8 + 4a) = 13

Reorder the terms:
-8 + -3a + 4a = 13

Combine like terms: -3a + 4a = 1a
-8 + 1a = 13

Solving
-8 + 1a = 13

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 + 1a = 13 + 8

Combine like terms: -8 + 8 = 0
0 + 1a = 13 + 8
1a = 13 + 8

Combine like terms: 13 + 8 = 21
1a = 21

Divide each side by '1'.
a = 21

Simplifying
a = 21

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