9x+3=2x+21

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Solution for 9x+3=2x+21 equation: 


Simplifying
9x + 3 = 2x + 21

Reorder the terms:
3 + 9x = 2x + 21

Reorder the terms:
3 + 9x = 21 + 2x

Solving
3 + 9x = 21 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
3 + 9x + -2x = 21 + 2x + -2x

Combine like terms: 9x + -2x = 7x
3 + 7x = 21 + 2x + -2x

Combine like terms: 2x + -2x = 0
3 + 7x = 21 + 0
3 + 7x = 21

Add '-3' to each side of the equation.
3 + -3 + 7x = 21 + -3

Combine like terms: 3 + -3 = 0
0 + 7x = 21 + -3
7x = 21 + -3

Combine like terms: 21 + -3 = 18
7x = 18

Divide each side by '7'.
x = 2.571428571

Simplifying
x = 2.571428571

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