21x-42+20=4x+12

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Solution for 21x-42+20=4x+12 equation:


Simplifying
21x + -42 + 20 = 4x + 12

Reorder the terms:
-42 + 20 + 21x = 4x + 12

Combine like terms: -42 + 20 = -22
-22 + 21x = 4x + 12

Reorder the terms:
-22 + 21x = 12 + 4x

Solving
-22 + 21x = 12 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
-22 + 21x + -4x = 12 + 4x + -4x

Combine like terms: 21x + -4x = 17x
-22 + 17x = 12 + 4x + -4x

Combine like terms: 4x + -4x = 0
-22 + 17x = 12 + 0
-22 + 17x = 12

Add '22' to each side of the equation.
-22 + 22 + 17x = 12 + 22

Combine like terms: -22 + 22 = 0
0 + 17x = 12 + 22
17x = 12 + 22

Combine like terms: 12 + 22 = 34
17x = 34

Divide each side by '17'.
x = 2

Simplifying
x = 2

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