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5\times 4.9=7x
Multiply both sides of the equation by 700, the least common multiple of 140,100.
24.5=7x
Multiply 5 and 4.9 to get 24.5.
7x=24.5
Swap sides so that all variable terms are on the left hand side.
x=\frac{24.5}{7}
Divide both sides by 7.
x=\frac{245}{70}
Expand \frac{24.5}{7} by multiplying both numerator and the denominator by 10.
x=\frac{7}{2}
Reduce the fraction \frac{245}{70} to lowest terms by extracting and canceling out 35.