Solve for x
x=0.7
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2.1=3x
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by x.
3x=2.1
Swap sides so that all variable terms are on the left hand side.
x=\frac{2.1}{3}
Divide both sides by 3.
x=\frac{21}{30}
Expand \frac{2.1}{3} by multiplying both numerator and the denominator by 10.
x=\frac{7}{10}
Reduce the fraction \frac{21}{30} to lowest terms by extracting and canceling out 3.
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