Find the solution of the system of equations using the substitution method.
1. y = 2x
2. y = x + 3
x + y = 9
2x + 2y = 38

Substitute for x in the second equation:-

2(y + 3) + y = 9

2y + 6 + y = 9

3y = 9 - 6 = 3

so y =  3/3  = 1

x = 1 + 3 = 4

So you answer is x = 4 and y = 1.

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