Question 943907
T=20 peso bills; F=50 peso bills=2T+10
20T+50F=3690 Substitute for F
20T+50(2T+10)=20T+100T+500=3690
120T+500=3690 Subtract 500 from each side
120T+500-500=3690-500
120T=3190 divide each side by 120
120T/120=3190/120
T=26.58=27 ANSWER 1 There are 27 - 20 peso bills in the machine
F=2T+10=53.16+10=63.16=63 ANSWER 2 there are 63 - 50 peso bills in the machine
CHECK:
20T+50F=3690
20(27)+50(63)=3690
540+3150=3690
3690=3690