Question 151081


{{{x/7-x/9=4}}} Start with the given equation.



{{{63(x/cross(7)-x/cross(9))=63(4)}}} Multiply both sides by the LCD {{{63}}} to clear any fractions.



{{{9x-7x=252}}} Distribute and multiply.



{{{2x=252}}} Combine like terms on the left side.



{{{x=(252)/(2)}}} Divide both sides by {{{2}}} to isolate {{{x}}}.



{{{x=126}}} Reduce.



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Answer:


So the answer is {{{x=126}}}