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7x=350+490\left(x-\frac{10}{7}\right)
Multiply both sides of the equation by 35, the least common multiple of 5,7.
7x=350+490x+490\left(-\frac{10}{7}\right)
Use the distributive property to multiply 490 by x-\frac{10}{7}.
7x=350+490x+\frac{490\left(-10\right)}{7}
Express 490\left(-\frac{10}{7}\right) as a single fraction.
7x=350+490x+\frac{-4900}{7}
Multiply 490 and -10 to get -4900.
7x=350+490x-700
Divide -4900 by 7 to get -700.
7x=-350+490x
Subtract 700 from 350 to get -350.
7x-490x=-350
Subtract 490x from both sides.
-483x=-350
Combine 7x and -490x to get -483x.
x=\frac{-350}{-483}
Divide both sides by -483.
x=\frac{50}{69}
Reduce the fraction \frac{-350}{-483} to lowest terms by extracting and canceling out -7.