Question 181211
(1)3y-4x=-1
(2)y-5x=-15
**
From (2), y=5x-15. Substituting this to (1) we have.

3(5x-15)-4x=-1
(15x-45)-4x=-1
11x-45=-1
11x=44
x=4

y=5x-15=5(4)-15=20-15=5

Therefore, the solution set is {(4,5)} Thus you are correct.

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