Which ordered pair in the form (a,b) is a solution of this equation?
3a-4b=21
A) (7,0)
B) (-2,-3)
C) (0,7)
D) (-3,-2)

Question

Which ordered pair in the form (a,b) is a solution of this equation?
3a-4b=21
A) (7,0)
B) (-2,-3)
C) (0,7)
D) (-3,-2)

anonymous · Answer

@Peach-es1234

alexandervonhumboldt2 · Answer

subtitute the points:

3*7-4*0=21   check if this is correct
3*(-2)-4*(-3)=21  check is this is correct
3*0-4*7=21   check is this is correct
3*(-3)-4*(-2)=21   check is this is correct

vickyisthesmartone123 · Answer

Well fit in each number and it should give you the answer

anonymous · Answer

C - (7,0) because 3x7= 21 add 4x0 = 0 which then equals 21 :)

vickyisthesmartone123 · Answer

Nope it is the second one

anonymous · Answer

ummm....?? i dont kow who is right? @Vickyisthesmartone123 can you explain?

alexandervonhumboldt2 · Answer

3*7-4*0=21
3*7-0=21
21=21

anonymous · Answer

@AlexandervonHumboldt2 yea i was kinda leaning toward that one since the others didnt really make sense to me thx

anonymous · Answer

It is a! :)

vickyisthesmartone123 · Answer

Yep sorry it is A

anonymous · Answer

@Peach-es1234 thx for your help. another?

anonymous · Answer

Ya I put c instead of a. sorry bout the confusion.

anonymous · Answer

Ask Away! :)

vickyisthesmartone123 · Answer

MEDAL ME OR WHOEVER HELPED YOU THE MOST KID!