Question 181056
let the amount of your paycheck and coworker paycheck be a and b, respectively
:
a=b-.15b........eq 1
a+b=680.........eq 2
:
rewrite eq 1 to be .85b and plug that into eq 2
:
.85b+b=680
:
1.85b=680
:
${{{highlight(b=367.57)}}}amount of coworkers pay check
:
${{{highlight(a=680-367.57=312.43)}}}amount of your paycheck