x+x*3+x+21=86

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Solution for x+x*3+x+21=86 equation:


Simplifying
x + x * 3 + x + 21 = 86

Reorder the terms for easier multiplication:
x + 3x + x + 21 = 86

Reorder the terms:
21 + x + 3x + x = 86

Combine like terms: x + 3x = 4x
21 + 4x + x = 86

Combine like terms: 4x + x = 5x
21 + 5x = 86

Solving
21 + 5x = 86

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 5x = 86 + -21

Combine like terms: 21 + -21 = 0
0 + 5x = 86 + -21
5x = 86 + -21

Combine like terms: 86 + -21 = 65
5x = 65

Divide each side by '5'.
x = 13

Simplifying
x = 13

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