3x-15=100

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Solution for 3x-15=100 equation: 


Simplifying
3x + -15 = 100

Reorder the terms:
-15 + 3x = 100

Solving
-15 + 3x = 100

Solving for variable 'x'.

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

Add '15' to each side of the equation.
-15 + 15 + 3x = 100 + 15

Combine like terms: -15 + 15 = 0
0 + 3x = 100 + 15
3x = 100 + 15

Combine like terms: 100 + 15 = 115
3x = 115

Divide each side by '3'.
x = 38.33333333

Simplifying
x = 38.33333333

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