4a-18=-20

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Solution for 4a-18=-20 equation: 


Simplifying
4a + -18 = -20

Reorder the terms:
-18 + 4a = -20

Solving
-18 + 4a = -20

Solving for variable 'a'.

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

Add '18' to each side of the equation.
-18 + 18 + 4a = -20 + 18

Combine like terms: -18 + 18 = 0
0 + 4a = -20 + 18
4a = -20 + 18

Combine like terms: -20 + 18 = -2
4a = -2

Divide each side by '4'.
a = -0.5

Simplifying
a = -0.5

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