12-2(a-4)=13

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Solution for 12-2(a-4)=13 equation:


Simplifying
12 + -2(a + -4) = 13

Reorder the terms:
12 + -2(-4 + a) = 13
12 + (-4 * -2 + a * -2) = 13
12 + (8 + -2a) = 13

Combine like terms: 12 + 8 = 20
20 + -2a = 13

Solving
20 + -2a = 13

Solving for variable 'a'.

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

Add '-20' to each side of the equation.
20 + -20 + -2a = 13 + -20

Combine like terms: 20 + -20 = 0
0 + -2a = 13 + -20
-2a = 13 + -20

Combine like terms: 13 + -20 = -7
-2a = -7

Divide each side by '-2'.
a = 3.5

Simplifying
a = 3.5

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