Solve for x
x\geq 3
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x-0.3x\geq 2.1
Subtract 0.3x from both sides.
0.7x\geq 2.1
Combine x and -0.3x to get 0.7x.
x\geq \frac{2.1}{0.7}
Divide both sides by 0.7. Since 0.7 is positive, the inequality direction remains the same.
x\geq \frac{21}{7}
Expand \frac{2.1}{0.7} by multiplying both numerator and the denominator by 10.
x\geq 3
Divide 21 by 7 to get 3.
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