Question

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​

Answer 1

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

• Now plug this value of y into first eqution >_<.... ^_^....

x = 1 + 3 = 4

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

Explanation: