Question

Please help me with these I'm lost

Answer 1

Y = (2/3)x + 6
3y - 5x = 9

find an expression for y from the second equation:-
y = (5/3)x + 3
Now substitute this for y in the first equation:-
(5/3) x + 3 = (2/3)x + 6  Now solve for x:-
(5/3)x - (2/3)x  = 6 - 3
x = 3
Now plug x = 3 into the second equation to find the value of y:_
3y - 5(3) =9
3y = 15+9 = 24
y = 8
So the solution is x = 3, y = 8

written as a set this is {3,8}.