9-39=42x

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Solution for 9-39=42x equation:


Simplifying
9 + -39 = 42x

Combine like terms: 9 + -39 = -30
-30 = 42x

Solving
-30 = 42x

Solving for variable 'x'.

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

Add '-42x' to each side of the equation.
-30 + -42x = 42x + -42x

Combine like terms: 42x + -42x = 0
-30 + -42x = 0

Add '30' to each side of the equation.
-30 + 30 + -42x = 0 + 30

Combine like terms: -30 + 30 = 0
0 + -42x = 0 + 30
-42x = 0 + 30

Combine like terms: 0 + 30 = 30
-42x = 30

Divide each side by '-42'.
x = -0.7142857143

Simplifying
x = -0.7142857143

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