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7x=6.8-2.6
Subtract 2.6 from both sides.
7x=4.2
Subtract 2.6 from 6.8 to get 4.2.
x=\frac{4.2}{7}
Divide both sides by 7.
x=\frac{42}{70}
Expand \frac{4.2}{7} by multiplying both numerator and the denominator by 10.
x=\frac{3}{5}
Reduce the fraction \frac{42}{70} to lowest terms by extracting and canceling out 14.