4+5=X+7

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Solution for 4+5=X+7 equation: 


Simplifying
4 + 5 = X + 7

Combine like terms: 4 + 5 = 9
9 = X + 7

Reorder the terms:
9 = 7 + X

Solving
9 = 7 + X

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.
9 + -1X = 7 + X + -1X

Combine like terms: X + -1X = 0
9 + -1X = 7 + 0
9 + -1X = 7

Add '-9' to each side of the equation.
9 + -9 + -1X = 7 + -9

Combine like terms: 9 + -9 = 0
0 + -1X = 7 + -9
-1X = 7 + -9

Combine like terms: 7 + -9 = -2
-1X = -2

Divide each side by '-1'.
X = 2

Simplifying
X = 2

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