40+3x=90

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Solution for 40+3x=90 equation: 


Simplifying
40 + 3x = 90

Solving
40 + 3x = 90

Solving for variable 'x'.

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

Add '-40' to each side of the equation.
40 + -40 + 3x = 90 + -40

Combine like terms: 40 + -40 = 0
0 + 3x = 90 + -40
3x = 90 + -40

Combine like terms: 90 + -40 = 50
3x = 50

Divide each side by '3'.
x = 16.66666667

Simplifying
x = 16.66666667

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