Answer:
2) x = 3 and y = 9
Step-by-step explanation:
2) Given the simultaneos equation;
6x - 9 = y .... 1
y = 3x ... 2
Substitute equation 2 into 1 as shown;
6x - 9 = 3x
Collect the like terms
6x - 3x = 0+9
3x = 9
Divide both sides by 3
3x/3 = 9/3
x = 3
Recall that y = 3x
y = 3(3)
y = 9
Hence the solution to the system of equation is (3, 9)