10x-21=5x+4

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Solution for 10x-21=5x+4 equation:


Simplifying
10x + -21 = 5x + 4

Reorder the terms:
-21 + 10x = 5x + 4

Reorder the terms:
-21 + 10x = 4 + 5x

Solving
-21 + 10x = 4 + 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 + 10x + -5x = 4 + 5x + -5x

Combine like terms: 10x + -5x = 5x
-21 + 5x = 4 + 5x + -5x

Combine like terms: 5x + -5x = 0
-21 + 5x = 4 + 0
-21 + 5x = 4

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

Combine like terms: -21 + 21 = 0
0 + 5x = 4 + 21
5x = 4 + 21

Combine like terms: 4 + 21 = 25
5x = 25

Divide each side by '5'.
x = 5

Simplifying
x = 5

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