9x-4x+2=21

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Solution for 9x-4x+2=21 equation:


Simplifying
9x + -4x + 2 = 21

Reorder the terms:
2 + 9x + -4x = 21

Combine like terms: 9x + -4x = 5x
2 + 5x = 21

Solving
2 + 5x = 21

Solving for variable 'x'.

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

Add '-2' to each side of the equation.
2 + -2 + 5x = 21 + -2

Combine like terms: 2 + -2 = 0
0 + 5x = 21 + -2
5x = 21 + -2

Combine like terms: 21 + -2 = 19
5x = 19

Divide each side by '5'.
x = 3.8

Simplifying
x = 3.8

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