Mabel can buy T-shirts in packs of 5 for $8.85 or in packs of 2 for $5.96. How much money does she save by buying 30 T-shirts at the better price?

x = ± 6i

step-by-step explanation:

x^2 = -36

take the square root of each side

sqrt(x^2) = sqrt(-36)

we know sqrt(ab) = sqrt(a) sqrt(b)

x = ±sqrt(36) sqrt(-1)

we know that sqrt (-1) = i

x = ± 6i

answer: x=60