qais4002
28.06.2019 •
Mathematics
Which ordered pair in the form (a, b) is a solution of this equation? 3a – 4b = 21 a. (–3, –2) b. (–2, –3) c. (0, 7) d. (7, 0)
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Ответ:
D. (7,0)
Step-by-step explanation:
Our original equation is 3a-4b=21.
The one we will try first is D. (7, 0)
Since we need to plug it in the form of (a,b) here is the equation now:
3(7)-4(0)=21
Now we solve:
3*7=21
4*0=0
Now we have 21-0=21
21-0 does equal 21.
Ответ:
Ответ:
Step-by-step explanation: