Jeff sells a total of 30 adult and children's tickets for $102. If children's tickets cost $2.50 and adult tickets cost $4,
how many of each ticket did he sell?

26?

step-by-step explanation:

your answer would be 12

x=-7

step-by-step explanation:

x+3=-10

-10+3=-7

x=-7

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb