4x-9x+1=21

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Solution for 4x-9x+1=21 equation:


Simplifying
4x + -9x + 1 = 21

Reorder the terms:
1 + 4x + -9x = 21

Combine like terms: 4x + -9x = -5x
1 + -5x = 21

Solving
1 + -5x = 21

Solving for variable 'x'.

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

Add '-1' to each side of the equation.
1 + -1 + -5x = 21 + -1

Combine like terms: 1 + -1 = 0
0 + -5x = 21 + -1
-5x = 21 + -1

Combine like terms: 21 + -1 = 20
-5x = 20

Divide each side by '-5'.
x = -4

Simplifying
x = -4

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