Question

for what value of a will the lines represented by the equation 3x+4y=12and 9x+ay=20 be paralel is​

Answer 1

Step-by-step explanation:

For parallel lines :

A1/A2 = B1/B2 ≠ C1/C2

THEREFORE, 3/9 = 4/a = 12/20

Also, 4/a = 3/9

4/a = 1/3

a = 12

PlS mark me as brainliest