Question

Find two consecutive odd integers whose sum is 72. Which equation would be used to solve this problem? (HINT: The equation has been simplified some.)

2x = 72
2x + 2 = 72
x + 2 = 72
2x + 1 = 72

Answer 1

the first one ?

Answer 2

Since x must be odd then:
x + x + 2=72 so 2x+2=72 would be correct

Answer 3

the odd integers go 1,3,5,7,....
pick one (anyone) say 3
the next one is 5, or 2 more
so I would say call the first odd integer n and the next one is 2 up, or n+2

now add them together: n+(n+2) = 2n+2
they add up to 72
2n+2= 72

Answer 4

second one ?

Answer 5

yepp second one :)

Answer 6

yes, x or n does not matter. It just means unknown

Answer 7

that was my second choice

Answer 8

If you make it your first choice you will get a better score on the test.

Answer 9

btw, notice if you solve the first equation, you get x=36 and 36 is not odd, so that is a clue it's the wrong equation.