50*9-x=420

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Solution for 50*9-x=420 equation: 


Simplifying
50 * 9 + -1x = 420

Multiply 50 * 9
450 + -1x = 420

Solving
450 + -1x = 420

Solving for variable 'x'.

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

Add '-450' to each side of the equation.
450 + -450 + -1x = 420 + -450

Combine like terms: 450 + -450 = 0
0 + -1x = 420 + -450
-1x = 420 + -450

Combine like terms: 420 + -450 = -30
-1x = -30

Divide each side by '-1'.
x = 30

Simplifying
x = 30

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