15-7x=42

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Solution for 15-7x=42 equation: 


Simplifying
15 + -7x = 42

Solving
15 + -7x = 42

Solving for variable 'x'.

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

Add '-15' to each side of the equation.
15 + -15 + -7x = 42 + -15

Combine like terms: 15 + -15 = 0
0 + -7x = 42 + -15
-7x = 42 + -15

Combine like terms: 42 + -15 = 27
-7x = 27

Divide each side by '-7'.
x = -3.857142857

Simplifying
x = -3.857142857

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