30+45+3x=90

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Solution for 30+45+3x=90 equation: 


Simplifying
30 + 45 + 3x = 90

Combine like terms: 30 + 45 = 75
75 + 3x = 90

Solving
75 + 3x = 90

Solving for variable 'x'.

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

Add '-75' to each side of the equation.
75 + -75 + 3x = 90 + -75

Combine like terms: 75 + -75 = 0
0 + 3x = 90 + -75
3x = 90 + -75

Combine like terms: 90 + -75 = 15
3x = 15

Divide each side by '3'.
x = 5

Simplifying
x = 5

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