If 5 kids like reading and 6 kids like science and 7 kids like pe how would i write this as an equation

Use different variables to signify the different types of students...?

I'll do the first one for you. it isn't very hard at all.on number one, you have (50 × 3), which equals 150, and (3 × 3), which equals 9. after you establish that, you add 150 and 9 together. so, (150 + 9) equals 159.this means that 53 × 3 = 159.