3x+20=45-x

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Solution for 3x+20=45-x equation:


Simplifying
3x + 20 = 45 + -1x

Reorder the terms:
20 + 3x = 45 + -1x

Solving
20 + 3x = 45 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
20 + 3x + x = 45 + -1x + x

Combine like terms: 3x + x = 4x
20 + 4x = 45 + -1x + x

Combine like terms: -1x + x = 0
20 + 4x = 45 + 0
20 + 4x = 45

Add '-20' to each side of the equation.
20 + -20 + 4x = 45 + -20

Combine like terms: 20 + -20 = 0
0 + 4x = 45 + -20
4x = 45 + -20

Combine like terms: 45 + -20 = 25
4x = 25

Divide each side by '4'.
x = 6.25

Simplifying
x = 6.25

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