Solve for x
x=\frac{28}{31}\approx 0.903225806
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Linear Equation
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\frac { 5 } { 4 } x + \frac { 3 } { 10 } x = \frac { 7 } { 5 }
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\frac{31}{20}x=\frac{7}{5}
Combine \frac{5}{4}x and \frac{3}{10}x to get \frac{31}{20}x.
x=\frac{7}{5}\times \frac{20}{31}
Multiply both sides by \frac{20}{31}, the reciprocal of \frac{31}{20}.
x=\frac{7\times 20}{5\times 31}
Multiply \frac{7}{5} times \frac{20}{31} by multiplying numerator times numerator and denominator times denominator.
x=\frac{140}{155}
Do the multiplications in the fraction \frac{7\times 20}{5\times 31}.
x=\frac{28}{31}
Reduce the fraction \frac{140}{155} to lowest terms by extracting and canceling out 5.
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