Andrea buys 1/3 kg of rice. this amount is 1/5 the amount of rice she has at home at home . how many kilograms of rice does andrea have a home?

Knowing that 1/3 kg of rice is 1/5 of the amount she has, we simply divide 1/3 by 1/5:

1/3 / 1/5

1/3 * 5

5/3 kg

Andrea has 1 and 2/3 kg of rice

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb