20x+21=3(6x+5)

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Solution for 20x+21=3(6x+5) equation:


Simplifying
20x + 21 = 3(6x + 5)

Reorder the terms:
21 + 20x = 3(6x + 5)

Reorder the terms:
21 + 20x = 3(5 + 6x)
21 + 20x = (5 * 3 + 6x * 3)
21 + 20x = (15 + 18x)

Solving
21 + 20x = 15 + 18x

Solving for variable 'x'.

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

Add '-18x' to each side of the equation.
21 + 20x + -18x = 15 + 18x + -18x

Combine like terms: 20x + -18x = 2x
21 + 2x = 15 + 18x + -18x

Combine like terms: 18x + -18x = 0
21 + 2x = 15 + 0
21 + 2x = 15

Add '-21' to each side of the equation.
21 + -21 + 2x = 15 + -21

Combine like terms: 21 + -21 = 0
0 + 2x = 15 + -21
2x = 15 + -21

Combine like terms: 15 + -21 = -6
2x = -6

Divide each side by '2'.
x = -3

Simplifying
x = -3

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