X+21+3X-15=180

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Solution for X+21+3X-15=180 equation:


Simplifying
X + 21 + 3X + -15 = 180

Reorder the terms:
21 + -15 + X + 3X = 180

Combine like terms: 21 + -15 = 6
6 + X + 3X = 180

Combine like terms: X + 3X = 4X
6 + 4X = 180

Solving
6 + 4X = 180

Solving for variable 'X'.

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

Add '-6' to each side of the equation.
6 + -6 + 4X = 180 + -6

Combine like terms: 6 + -6 = 0
0 + 4X = 180 + -6
4X = 180 + -6

Combine like terms: 180 + -6 = 174
4X = 174

Divide each side by '4'.
X = 43.5

Simplifying
X = 43.5

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