a+20=4(a+2)

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


Simplifying
a + 20 = 4(a + 2)

Reorder the terms:
20 + a = 4(a + 2)

Reorder the terms:
20 + a = 4(2 + a)
20 + a = (2 * 4 + a * 4)
20 + a = (8 + 4a)

Solving
20 + a = 8 + 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 + a + -4a = 8 + 4a + -4a

Combine like terms: a + -4a = -3a
20 + -3a = 8 + 4a + -4a

Combine like terms: 4a + -4a = 0
20 + -3a = 8 + 0
20 + -3a = 8

Add '-20' to each side of the equation.
20 + -20 + -3a = 8 + -20

Combine like terms: 20 + -20 = 0
0 + -3a = 8 + -20
-3a = 8 + -20

Combine like terms: 8 + -20 = -12
-3a = -12

Divide each side by '-3'.
a = 4

Simplifying
a = 4

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