21x-12=5(4x+3)-3

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Solution for 21x-12=5(4x+3)-3 equation:


Simplifying
21x + -12 = 5(4x + 3) + -3

Reorder the terms:
-12 + 21x = 5(4x + 3) + -3

Reorder the terms:
-12 + 21x = 5(3 + 4x) + -3
-12 + 21x = (3 * 5 + 4x * 5) + -3
-12 + 21x = (15 + 20x) + -3

Reorder the terms:
-12 + 21x = 15 + -3 + 20x

Combine like terms: 15 + -3 = 12
-12 + 21x = 12 + 20x

Solving
-12 + 21x = 12 + 20x

Solving for variable 'x'.

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

Add '-20x' to each side of the equation.
-12 + 21x + -20x = 12 + 20x + -20x

Combine like terms: 21x + -20x = 1x
-12 + 1x = 12 + 20x + -20x

Combine like terms: 20x + -20x = 0
-12 + 1x = 12 + 0
-12 + 1x = 12

Add '12' to each side of the equation.
-12 + 12 + 1x = 12 + 12

Combine like terms: -12 + 12 = 0
0 + 1x = 12 + 12
1x = 12 + 12

Combine like terms: 12 + 12 = 24
1x = 24

Divide each side by '1'.
x = 24

Simplifying
x = 24

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