20=4(a-3)

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Solution for 20=4(a-3) equation:


Simplifying
20 = 4(a + -3)

Reorder the terms:
20 = 4(-3 + a)
20 = (-3 * 4 + a * 4)
20 = (-12 + 4a)

Solving
20 = -12 + 4a

Solving for variable 'a'.

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

Add '-4a' to each side of the equation.
20 + -4a = -12 + 4a + -4a

Combine like terms: 4a + -4a = 0
20 + -4a = -12 + 0
20 + -4a = -12

Add '-20' to each side of the equation.
20 + -20 + -4a = -12 + -20

Combine like terms: 20 + -20 = 0
0 + -4a = -12 + -20
-4a = -12 + -20

Combine like terms: -12 + -20 = -32
-4a = -32

Divide each side by '-4'.
a = 8

Simplifying
a = 8

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