2x-3+4x=21

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Solution for 2x-3+4x=21 equation: 


Simplifying
2x + -3 + 4x = 21

Reorder the terms:
-3 + 2x + 4x = 21

Combine like terms: 2x + 4x = 6x
-3 + 6x = 21

Solving
-3 + 6x = 21

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + 6x = 21 + 3

Combine like terms: -3 + 3 = 0
0 + 6x = 21 + 3
6x = 21 + 3

Combine like terms: 21 + 3 = 24
6x = 24

Divide each side by '6'.
x = 4

Simplifying
x = 4

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