Answer:
they are the same line! hence there are infinite number of solutions
Step-by-step explanation:
y-10=3x (rearrange)
we get: y = 3x + 10 ----------- eq. (1)
2y=6x+20 (divide both sides by 2)
we get: y = 3x + 10 ----------- eq. (2)
We can see that (1) = (2).
i.e they are the same line! hence there are infinite number of solutions.