2a-(-4)=20

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Solution for 2a-(-4)=20 equation: 


Simplifying
2a + -1(-4) = 20

Multiply -1 * -4
2a + 4 = 20

Reorder the terms:
4 + 2a = 20

Solving
4 + 2a = 20

Solving for variable 'a'.

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

Add '-4' to each side of the equation.
4 + -4 + 2a = 20 + -4

Combine like terms: 4 + -4 = 0
0 + 2a = 20 + -4
2a = 20 + -4

Combine like terms: 20 + -4 = 16
2a = 16

Divide each side by '2'.
a = 8

Simplifying
a = 8

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