4x+21=5x+13

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Solution for 4x+21=5x+13 equation:


Simplifying
4x + 21 = 5x + 13

Reorder the terms:
21 + 4x = 5x + 13

Reorder the terms:
21 + 4x = 13 + 5x

Solving
21 + 4x = 13 + 5x

Solving for variable 'x'.

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

Add '-5x' to each side of the equation.
21 + 4x + -5x = 13 + 5x + -5x

Combine like terms: 4x + -5x = -1x
21 + -1x = 13 + 5x + -5x

Combine like terms: 5x + -5x = 0
21 + -1x = 13 + 0
21 + -1x = 13

Add '-21' to each side of the equation.
21 + -21 + -1x = 13 + -21

Combine like terms: 21 + -21 = 0
0 + -1x = 13 + -21
-1x = 13 + -21

Combine like terms: 13 + -21 = -8
-1x = -8

Divide each side by '-1'.
x = 8

Simplifying
x = 8

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