x-1=3x+15

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Solution for x-1=3x+15 equation:


Simplifying
x + -1 = 3x + 15

Reorder the terms:
-1 + x = 3x + 15

Reorder the terms:
-1 + x = 15 + 3x

Solving
-1 + x = 15 + 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.
-1 + x + -3x = 15 + 3x + -3x

Combine like terms: x + -3x = -2x
-1 + -2x = 15 + 3x + -3x

Combine like terms: 3x + -3x = 0
-1 + -2x = 15 + 0
-1 + -2x = 15

Add '1' to each side of the equation.
-1 + 1 + -2x = 15 + 1

Combine like terms: -1 + 1 = 0
0 + -2x = 15 + 1
-2x = 15 + 1

Combine like terms: 15 + 1 = 16
-2x = 16

Divide each side by '-2'.
x = -8

Simplifying
x = -8

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