Find the value of a for which the given pair of linear equations ax + 9y + 10 = 0 and
12x + 12ay + 3a - 31 O has infinite solutions
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specify properly
the question is very different
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Answer:
-3
Step-by-step explanation:
ax+9y+10=0
12x+12ay+3a-31=0
a1=a, b1=9, c1=10
a2=12, b2=12a, c2=3a-31
For infinite solutions a1/a2= b1/b2= c1/c2
a1/a2=b1/b2 and b1/b2= c1/c2
a/12=9/12a and 9/12a= 10/3a-31
a²=9 ie.. a= +or-3
27a-279=120a
93a= -279 ie. a= -3
therefore, a= -3
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