what is tom's salary per week

Question

Average salary of Tom, Emma, Roobin and Mary is $170 per week per person. Averge salary of Tom Emma And robin is $160 per week per person

Robin make $5 more than Mary

Emma's salary is 4/5 of Mary's

Answer 1

T + E + R + M = 680

T + E + R = 480         See what Mary must make? 

R = M + 5

E = 4M/5

 

You can solve?