40+x=20-3x

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Solution for 40+x=20-3x equation:


Simplifying
40 + x = 20 + -3x

Solving
40 + x = 20 + -3x

Solving for variable 'x'.

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

Add '3x' to each side of the equation.
40 + x + 3x = 20 + -3x + 3x

Combine like terms: x + 3x = 4x
40 + 4x = 20 + -3x + 3x

Combine like terms: -3x + 3x = 0
40 + 4x = 20 + 0
40 + 4x = 20

Add '-40' to each side of the equation.
40 + -40 + 4x = 20 + -40

Combine like terms: 40 + -40 = 0
0 + 4x = 20 + -40
4x = 20 + -40

Combine like terms: 20 + -40 = -20
4x = -20

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

Simplifying
x = -5

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