X(7+8)-20=30

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Solution for X(7+8)-20=30 equation:


Simplifying
X(7 + 8) + -20 = 30

Combine like terms: 7 + 8 = 15
X(15) + -20 = 30

Reorder the terms for easier multiplication:
15X + -20 = 30

Reorder the terms:
-20 + 15X = 30

Solving
-20 + 15X = 30

Solving for variable 'X'.

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

Add '20' to each side of the equation.
-20 + 20 + 15X = 30 + 20

Combine like terms: -20 + 20 = 0
0 + 15X = 30 + 20
15X = 30 + 20

Combine like terms: 30 + 20 = 50
15X = 50

Divide each side by '15'.
X = 3.333333333

Simplifying
X = 3.333333333

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