3X-40+2X-20=90

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Solution for 3X-40+2X-20=90 equation: 


Simplifying
3X + -40 + 2X + -20 = 90

Reorder the terms:
-40 + -20 + 3X + 2X = 90

Combine like terms: -40 + -20 = -60
-60 + 3X + 2X = 90

Combine like terms: 3X + 2X = 5X
-60 + 5X = 90

Solving
-60 + 5X = 90

Solving for variable 'X'.

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

Add '60' to each side of the equation.
-60 + 60 + 5X = 90 + 60

Combine like terms: -60 + 60 = 0
0 + 5X = 90 + 60
5X = 90 + 60

Combine like terms: 90 + 60 = 150
5X = 150

Divide each side by '5'.
X = 30

Simplifying
X = 30

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