7x-21=2x+8

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Solution for 7x-21=2x+8 equation:


Simplifying
7x + -21 = 2x + 8

Reorder the terms:
-21 + 7x = 2x + 8

Reorder the terms:
-21 + 7x = 8 + 2x

Solving
-21 + 7x = 8 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
-21 + 7x + -2x = 8 + 2x + -2x

Combine like terms: 7x + -2x = 5x
-21 + 5x = 8 + 2x + -2x

Combine like terms: 2x + -2x = 0
-21 + 5x = 8 + 0
-21 + 5x = 8

Add '21' to each side of the equation.
-21 + 21 + 5x = 8 + 21

Combine like terms: -21 + 21 = 0
0 + 5x = 8 + 21
5x = 8 + 21

Combine like terms: 8 + 21 = 29
5x = 29

Divide each side by '5'.
x = 5.8

Simplifying
x = 5.8

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