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

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

anonymous · Answer

x+y=1120
3x-2y=1300
take 3 times the top equation and subtract the bottom

3(x+y)- (3x-2y)=3*1120-1300
and then 
3y+2y=2060
y=412
choice d

anonymous · Answer

thank u