x+16+2x-21=40

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Solution for x+16+2x-21=40 equation:


Simplifying
x + 16 + 2x + -21 = 40

Reorder the terms:
16 + -21 + x + 2x = 40

Combine like terms: 16 + -21 = -5
-5 + x + 2x = 40

Combine like terms: x + 2x = 3x
-5 + 3x = 40

Solving
-5 + 3x = 40

Solving for variable 'x'.

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

Add '5' to each side of the equation.
-5 + 5 + 3x = 40 + 5

Combine like terms: -5 + 5 = 0
0 + 3x = 40 + 5
3x = 40 + 5

Combine like terms: 40 + 5 = 45
3x = 45

Divide each side by '3'.
x = 15

Simplifying
x = 15

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