3x+78=90

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Solution for 3x+78=90 equation: 


Simplifying
3x + 78 = 90

Reorder the terms:
78 + 3x = 90

Solving
78 + 3x = 90

Solving for variable 'x'.

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

Add '-78' to each side of the equation.
78 + -78 + 3x = 90 + -78

Combine like terms: 78 + -78 = 0
0 + 3x = 90 + -78
3x = 90 + -78

Combine like terms: 90 + -78 = 12
3x = 12

Divide each side by '3'.
x = 4

Simplifying
x = 4

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