Solve by substitution 17x 4y 3 5x 25 2 8x 5y 31 y 3 So

Solve by substitution

1.7x + 4y = 3

  5x = 25

2. 8x - 5y + -31

    y = 3       

Solution

5x = 25

x = 5

1.7x+4y = 3

1.7(5)+4y = 3

8.5+4y = 3

4y = 3 - 8.5

y = -5.5/4

y = -1.375

2. y = 3

8x - 5y + (-31) = 0

8x - 5(3) + (-31) = 0

8x - 15 -31 = 0

8x - 46 = 0

8x = 46

x = 46/8

x = 5.75