x+3x+16=91

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Solution for x+3x+16=91 equation:


Simplifying
x + 3x + 16 = 91

Reorder the terms:
16 + x + 3x = 91

Combine like terms: x + 3x = 4x
16 + 4x = 91

Solving
16 + 4x = 91

Solving for variable 'x'.

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

Add '-16' to each side of the equation.
16 + -16 + 4x = 91 + -16

Combine like terms: 16 + -16 = 0
0 + 4x = 91 + -16
4x = 91 + -16

Combine like terms: 91 + -16 = 75
4x = 75

Divide each side by '4'.
x = 18.75

Simplifying
x = 18.75

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