15x+21=16x+31

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Solution for 15x+21=16x+31 equation:


Simplifying
15x + 21 = 16x + 31

Reorder the terms:
21 + 15x = 16x + 31

Reorder the terms:
21 + 15x = 31 + 16x

Solving
21 + 15x = 31 + 16x

Solving for variable 'x'.

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

Add '-16x' to each side of the equation.
21 + 15x + -16x = 31 + 16x + -16x

Combine like terms: 15x + -16x = -1x
21 + -1x = 31 + 16x + -16x

Combine like terms: 16x + -16x = 0
21 + -1x = 31 + 0
21 + -1x = 31

Add '-21' to each side of the equation.
21 + -21 + -1x = 31 + -21

Combine like terms: 21 + -21 = 0
0 + -1x = 31 + -21
-1x = 31 + -21

Combine like terms: 31 + -21 = 10
-1x = 10

Divide each side by '-1'.
x = -10

Simplifying
x = -10

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