Question

Jack and Cameron are playing a game of paper football by the rules you can score a five point touchdown or seven in the game there have been 13 touchdowns scored for a total of 71 points how many of these touchdowns were seven point touchdowns

Answer 1

3 seven point touchdowns

Explanation:

x=5 pointn

y=7point

x+y=13

5x+7y=71

solve

multiply first equaiton by -5 and add

-5x-5y=-65

5x+7y=71 +

0x+2y=6

2y=6

divide 2

y=3

sub

x+y=13

x+3=13

x=10

10 five point touchdowns

3 seven point touchdowns