4X+15=21+1X

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Solution for 4X+15=21+1X equation: 


Simplifying
4X + 15 = 21 + 1X

Reorder the terms:
15 + 4X = 21 + 1X

Solving
15 + 4X = 21 + 1X

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.
15 + 4X + -1X = 21 + 1X + -1X

Combine like terms: 4X + -1X = 3X
15 + 3X = 21 + 1X + -1X

Combine like terms: 1X + -1X = 0
15 + 3X = 21 + 0
15 + 3X = 21

Add '-15' to each side of the equation.
15 + -15 + 3X = 21 + -15

Combine like terms: 15 + -15 = 0
0 + 3X = 21 + -15
3X = 21 + -15

Combine like terms: 21 + -15 = 6
3X = 6

Divide each side by '3'.
X = 2

Simplifying
X = 2

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