3x+21=x+17

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Solution for 3x+21=x+17 equation:


Simplifying
3x + 21 = x + 17

Reorder the terms:
21 + 3x = x + 17

Reorder the terms:
21 + 3x = 17 + x

Solving
21 + 3x = 17 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
21 + 3x + -1x = 17 + x + -1x

Combine like terms: 3x + -1x = 2x
21 + 2x = 17 + x + -1x

Combine like terms: x + -1x = 0
21 + 2x = 17 + 0
21 + 2x = 17

Add '-21' to each side of the equation.
21 + -21 + 2x = 17 + -21

Combine like terms: 21 + -21 = 0
0 + 2x = 17 + -21
2x = 17 + -21

Combine like terms: 17 + -21 = -4
2x = -4

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

Simplifying
x = -2

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