Question

Find the values of p and q for which the given system of

linear equations has infinite solutions:

2x + 3y = 7 ; 10px + 5(p + q) y = 140​

Answer 1

Answer:

to have infinite solution

a/1/a2=b1/b2=c1/c2

2/10p=3/5(p+q)=7/140

2/10p=7/140

5p=20

p=4

now

3/5(4+q)=7/140

60=20+5q

5q=40

q=8