21.3+1x=30

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Solution for 21.3+1x=30 equation: 


Simplifying
21.3 + 1x = 30

Solving
21.3 + 1x = 30

Solving for variable 'x'.

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

Add '-21.3' to each side of the equation.
21.3 + -21.3 + 1x = 30 + -21.3

Combine like terms: 21.3 + -21.3 = 0.0
0.0 + 1x = 30 + -21.3
1x = 30 + -21.3

Combine like terms: 30 + -21.3 = 8.7
1x = 8.7

Divide each side by '1'.
x = 8.7

Simplifying
x = 8.7

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