3x-2=16…need help on this one?
(a). Together John and Gwen bought 16 stamps. Gwen bought 2 fewer stamps than John. How many stamps did Gwen buy?
(b). Gwen bought 16 stamps, which was 2 more than John bought. How many stamps did John buy?
(c). John bought three times as many stamps as Gwen. After he used 2 of them, he had 16 left. How many stamps did Gwen buy?
(d) Gwen bought 2 fewer than 3 times as many stamps as John. How many stamps did John buy?
I think the answer is c. Am i right?
Favorite Answer
Equation: 3x – 2 = 16
(3 x 2) – 2 = 16
6 – 2 = 16
4 = 16
[The answer doesn’t match, so (a) is eliminated]
Checking (b):
Equation: 3x – 2 = 16
(3 x 16) – 2 = 16
48 – 2 = 16
46 = 16
[The answer doesn’t match, so (b) is eliminated]
Checking (c):
Equation: 3x – 2 = 16
(3 x 6) – 2 = 16
18 – 2 =16
16 = 16
[The answer matches, so therefore (c) could be it]
option (d) doesn’t give us enough information to check with the equation … so (d) is elminated.
Therefore, you are correct. (c) is the answer!
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