Question

solve by substitution method 2x-y=1 and 5x +2y=25 ​

Answer 1

Answer:

x=3 and y=5

Step-by-step explanation:

1. 2x - y = 1
2. 2x - 1 = y ..........(1)
3. 5x + 2y = 25 ..........(2)

Substituting (1) in (2)

1. 5x + 2(2x - 1) = 25
2. 5x + 4x - 2 = 25
3. 9x = 25 + 2
4. 9x = 27
5. x = 27/9
6. x = 3

Substituting x = 3 in (1)

1. y = 2*3 - 1
2. y = 6-1
3. y = 5