7+3x=121-x

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Solution for 7+3x=121-x equation:


Simplifying
7 + 3x = 121 + -1x

Solving
7 + 3x = 121 + -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.
7 + 3x + x = 121 + -1x + x

Combine like terms: 3x + x = 4x
7 + 4x = 121 + -1x + x

Combine like terms: -1x + x = 0
7 + 4x = 121 + 0
7 + 4x = 121

Add '-7' to each side of the equation.
7 + -7 + 4x = 121 + -7

Combine like terms: 7 + -7 = 0
0 + 4x = 121 + -7
4x = 121 + -7

Combine like terms: 121 + -7 = 114
4x = 114

Divide each side by '4'.
x = 28.5

Simplifying
x = 28.5

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