15+5-x=30

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Solution for 15+5-x=30 equation: 


Simplifying
15 + 5 + -1x = 30

Combine like terms: 15 + 5 = 20
20 + -1x = 30

Solving
20 + -1x = 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 + -1x = 30 + -20

Combine like terms: 20 + -20 = 0
0 + -1x = 30 + -20
-1x = 30 + -20

Combine like terms: 30 + -20 = 10
-1x = 10

Divide each side by '-1'.
x = -10

Simplifying
x = -10

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