8x+9x-21=12-16

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Solution for 8x+9x-21=12-16 equation:


Simplifying
8x + 9x + -21 = 12 + -16

Reorder the terms:
-21 + 8x + 9x = 12 + -16

Combine like terms: 8x + 9x = 17x
-21 + 17x = 12 + -16

Combine like terms: 12 + -16 = -4
-21 + 17x = -4

Solving
-21 + 17x = -4

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + 17x = -4 + 21

Combine like terms: -21 + 21 = 0
0 + 17x = -4 + 21
17x = -4 + 21

Combine like terms: -4 + 21 = 17
17x = 17

Divide each side by '17'.
x = 1

Simplifying
x = 1

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