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 1070! If three times the number of one-step equations minus twice the number of two-step equations is equal to 110, how many one-step equations auditioned today?

900

620

520

450

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 1070! If three times the number of one-step equations minus twice the number of two-step equations is equal to 110, how many one-step equations auditioned today?

900

620

520

450

turingtest · Answer

x=#two-steps
y=#one-steps
  y+x=1070
3y-2x=110
multiply the first eqn. by 2 and add it to the second equation:
5y=2250
  y=450

anonymous · Answer

$$3x_1-2x_2=110. solve for x$$

turingtest · Answer

@alexmiles
you cant solve for x when you have 2 variables and only one eqn.

anonymous · Answer

* in combination with the other equation, solve for $$x_2$$