21x=3(2x+30)

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Solution for 21x=3(2x+30) equation:


Simplifying
21x = 3(2x + 30)

Reorder the terms:
21x = 3(30 + 2x)
21x = (30 * 3 + 2x * 3)
21x = (90 + 6x)

Solving
21x = 90 + 6x

Solving for variable 'x'.

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

Add '-6x' to each side of the equation.
21x + -6x = 90 + 6x + -6x

Combine like terms: 21x + -6x = 15x
15x = 90 + 6x + -6x

Combine like terms: 6x + -6x = 0
15x = 90 + 0
15x = 90

Divide each side by '15'.
x = 6

Simplifying
x = 6

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