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Which ordered pair in the form (a, b) is a solution of this equation?


3a – 4b = 21


A.

(–3, –2)


B.

(0, 7)


C.

(–2, –3)


D.

(7, 0)

Verified Answer :

3(7)-4(0)=21
3*7=21-0=21
the answer is D

substitute the first number in the (  ) for a and the second for b
3(-3)-4(-2)
-9+8 does not =21

B.  3(0)-4(7)
0-28 does not = 21

C.  3(-2)-4(-3)
-6+12 does not =21

D. 3(7)-4(0)= 21 yeah

answer is D (7,0)

hope this helps


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