9x-10-7x-21=-4

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Solution for 9x-10-7x-21=-4 equation:


Simplifying
9x + -10 + -7x + -21 = -4

Reorder the terms:
-10 + -21 + 9x + -7x = -4

Combine like terms: -10 + -21 = -31
-31 + 9x + -7x = -4

Combine like terms: 9x + -7x = 2x
-31 + 2x = -4

Solving
-31 + 2x = -4

Solving for variable 'x'.

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

Add '31' to each side of the equation.
-31 + 31 + 2x = -4 + 31

Combine like terms: -31 + 31 = 0
0 + 2x = -4 + 31
2x = -4 + 31

Combine like terms: -4 + 31 = 27
2x = 27

Divide each side by '2'.
x = 13.5

Simplifying
x = 13.5

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