Question 1196291


  If Paul has $1431 left after spending 1/5 of his monthly salary for rent and 1/8 of his monthly salary for his credit card bill, what was his monthly salary?

let {{{x}}} be Paul’s monthly salary

spending {{{1/5}}} of his monthly salary for rent and {{{1/8}}} of his monthly salary for his credit card bill, he spend in total {{{(1/5)x+(1/8)x}}}

if Paul has ${{{1431}}} left after spending, then  his monthly salary is

{{{x=(1/5)x+(1/8)x+1431}}}

{{{x-(1/5)x-(1/8)x=1431}}}

{{{(27x)/40=1431}}}

{{{27x=40*1431}}}

{{{x=57240/27}}}

{{{x=2120}}}

his monthly salary was ${{{2120}}}