0.21=0.07x

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Solution for 0.21=0.07x equation: 


Simplifying
0.21 = 0.07x

Solving
0.21 = 0.07x

Solving for variable 'x'.

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

Add '-0.07x' to each side of the equation.
0.21 + -0.07x = 0.07x + -0.07x

Combine like terms: 0.07x + -0.07x = 0.00
0.21 + -0.07x = 0.00

Add '-0.21' to each side of the equation.
0.21 + -0.21 + -0.07x = 0.00 + -0.21

Combine like terms: 0.21 + -0.21 = 0.00
0.00 + -0.07x = 0.00 + -0.21
-0.07x = 0.00 + -0.21

Combine like terms: 0.00 + -0.21 = -0.21
-0.07x = -0.21

Divide each side by '-0.07'.
x = 3

Simplifying
x = 3

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