21(3x+9)=15x+90

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Solution for 21(3x+9)=15x+90 equation:


Simplifying
21(3x + 9) = 15x + 90

Reorder the terms:
21(9 + 3x) = 15x + 90
(9 * 21 + 3x * 21) = 15x + 90
(189 + 63x) = 15x + 90

Reorder the terms:
189 + 63x = 90 + 15x

Solving
189 + 63x = 90 + 15x

Solving for variable 'x'.

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

Add '-15x' to each side of the equation.
189 + 63x + -15x = 90 + 15x + -15x

Combine like terms: 63x + -15x = 48x
189 + 48x = 90 + 15x + -15x

Combine like terms: 15x + -15x = 0
189 + 48x = 90 + 0
189 + 48x = 90

Add '-189' to each side of the equation.
189 + -189 + 48x = 90 + -189

Combine like terms: 189 + -189 = 0
0 + 48x = 90 + -189
48x = 90 + -189

Combine like terms: 90 + -189 = -99
48x = -99

Divide each side by '48'.
x = -2.0625

Simplifying
x = -2.0625

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