Will mark as brainliest and rated excellent if answer is right. The ratio of boys to girls in a group is 7:2. If there are 70 more boys than girls, work out how many people there are in total.

Step-by-step explanation:

Boys: girls = 7:2

No. of boys = 7x

No. of girls = 2x

7x - 2x = 70

5x = 70

x = 70/5

x = 14

No. of boys = 7x = 7*14 = 98

No. of girls = 2x = 2*14 = 28

Total = 98 + 28 = 126

step-by-step explanation:

1

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.