Question

30.The pair of equations 7x + 3y - 5= 0 and -21x -9y + 15 = 0 have:
a) Unique solution
b) no solution
c) Exactly two solutions
d) infinitely many solutions
please give correct answer don't spam
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Answer 1

Answer:

d

Step-by-step explanation:

a1/a2=b1/b2

7/-21=3/-9

-3=-3

b1/b2=c1/c2

3/-9=-5/15

-3=-3