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 610! If four times the number of one-step equations minus twice the number of two-step equations is equal to 340, how many one-step equations auditioned today?

260

340

350

670

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 610! If four times the number of one-step equations minus twice the number of two-step equations is equal to 340, how many one-step equations auditioned today?

 260

 340

 350

 670

anonymous · Answer

x + y = 610

4x - 2y = 340

find x

anonymous · Answer

so you'll want to multiply the first equation by 2 and add them

2x + 2y = 1220
4x - 2y = 340

6x = 1560 --> x = 260