Question

I will mark the brainliest
ax+2y=5
3x-6y=20
In the system of equations above, a is a constant.
If the system has one solution, which of the following can NOT be the value of a? Explain step by step
A) -1
B) $\frac{3}{4}$
C) 1
D) 3

Answer 1

Ans -1

Step-by-step explanation:

Condition for one solution of the equation is a1/a2 not equal to b1/b2 so only -1 is the value if we put in equation then it will become equal and all the other values are satisfying the condition.