Answer:
infinite number of solutions
Explanation:
y = 5x + 3 → (1)
2y = 10x + 6 → (2)
substitute y = 5x + 3 into (2)
2(5x + 3) = 10x + 6
10x + 6 = 10x + 6
since both sides are the same then any value of x will make the equation true.
This means there are an infinite number of solutions to the system