.4x-3=21

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Solution for .4x-3=21 equation: 


Simplifying
0.4x + -3 = 21

Reorder the terms:
-3 + 0.4x = 21

Solving
-3 + 0.4x = 21

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + 0.4x = 21 + 3

Combine like terms: -3 + 3 = 0
0 + 0.4x = 21 + 3
0.4x = 21 + 3

Combine like terms: 21 + 3 = 24
0.4x = 24

Divide each side by '0.4'.
x = 60

Simplifying
x = 60

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