3X+X+8=90

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Solution for 3X+X+8=90 equation:


Simplifying
3X + X + 8 = 90

Reorder the terms:
8 + 3X + X = 90

Combine like terms: 3X + X = 4X
8 + 4X = 90

Solving
8 + 4X = 90

Solving for variable 'X'.

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

Add '-8' to each side of the equation.
8 + -8 + 4X = 90 + -8

Combine like terms: 8 + -8 = 0
0 + 4X = 90 + -8
4X = 90 + -8

Combine like terms: 90 + -8 = 82
4X = 82

Divide each side by '4'.
X = 20.5

Simplifying
X = 20.5

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