2X+5X-9=40

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Solution for 2X+5X-9=40 equation: 


Simplifying
2X + 5X + -9 = 40

Reorder the terms:
-9 + 2X + 5X = 40

Combine like terms: 2X + 5X = 7X
-9 + 7X = 40

Solving
-9 + 7X = 40

Solving for variable 'X'.

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

Add '9' to each side of the equation.
-9 + 9 + 7X = 40 + 9

Combine like terms: -9 + 9 = 0
0 + 7X = 40 + 9
7X = 40 + 9

Combine like terms: 40 + 9 = 49
7X = 49

Divide each side by '7'.
X = 7

Simplifying
X = 7

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