Question

The three Math Idol judges have been eliminating contestants all day! The number of one-step equations and two-step equations who have been eliminated today is equal to 1120. If three times the number of one-step equations minus twice the number of two-step equations is equal to 1300, how many two-step equations eliminated today?

A)1300

B)1120

C)708

D)412

Answer 1

Come on anyone?

Answer 2

C

Answer 3

No A

Answer 4

Oh wait could be B

Answer 5

D looks viable...

Answer 6

Thanks...

Answer 7

this looks like algebra. start with
number of one-step equations = x (give the number of 1-step questions a "name")
number of two-step equations = y

It says the # of 1 step plus # of 2 step add up to equal to 1120.

you would say x+y= 1120

Answer 8

now translate
If three times the number of one-step equations minus twice the number of two-step equations is equal to 1300,
into math:

three times the number of one-step equations
3 * x or just 3x
minus means - so you now have 3x -
twice the number of two-step
2 * y or 2y

you now have: 3x - 2y
is equal to 1300,
= 1300

3x-2y = 1300

Answer 9

you have 2 equations and 2 unknowns
x+y= 1120
3x-2y = 1300

how many two-step equations eliminated today?
they want you to solve for y

Answer 10

So those are the two equations i have to do to find y?

Answer 11

yes

Answer 12

Thank you so much!