The cost of different substances can expressed as equations where x is the number of grams purchased and y is the total cost for the purchase.

Question

(Match up these two the ones from the top and bottom.)

25x = y

11x = y

56x = y

2x = y

X=y/25

X=y/2

X=11/y

X=y/56

X=25/y

X=56/y

X=2/y

X=y/11

Answer 1

1) To isolate x in 25x = y, we divide both sides by 25, which gives us x = y/25 (option 1)

2) To isolate x in 11x = y, we divide both sides by 11, which gives us x = y/11 (option 8)

3) To isolate x in 56x = y, we divide both sides by 56, which gives us x = y/56 (option 4)

4) To isolate x in 2x = y, we divide both sides by 2, which gives us x = y/2 (option 2)