Question

Please help me. I really need help
Solve using the guess-and-test strategy.

The math club has 57 members who are in sixth or seventh grades. There are twice as many sixth graders as seventh graders.

How many sixth graders are in the club?

A.
38

B.
37

C.
19

D.
18

Answer 1

Try 38. First divide 38 by 2, which equals 19. Then add 19 to 38 which will equal to 57. Hope this helps.

Answer 2

A. 38

Let X = seventh graders

6th graders are twice the number of 7th graders; therefore, 6th graders will be 2X.
The total number of students is 57.

2X + X = 57
3X       = 57
X         = 57 / 3
X         = 19

IF X represents the 7th graders; there are 19 seventh graders present.
Since 6th graders are represented by 2X; Then, 2 * 19 = 38 is the number of 6th graders present.

Add both numbers to check: 19 + 38 = 57.