Let x= the number of books purchased: 7 books purchased let y = the number of toys purchased;10 toys purchased Equations: x+y=17 6x+11y=152 x+10=17 -6(x+y=17) y=10 -10 -10 ------------ -6x-6y=-102 x=7 6x+11y=152 -------------------- 0x+5y=50 ---- ---- 5 5
