Question

2x-y=5
3x +y = 15
using substution method​

Answer 1

Answer:

x=4 y=3

Step-by-step explanation:

Step: Solve2x−y=5for y:

2x−y+−2x=5+−2x(Add -2x to both sides)

−y=−2x+5

−y /-1= -2x+5/-1

      y= 2x-5

Step: Step: Substitute2x−5foryin3x+y=15:

3x+y=15

3x+2x−5=15

5x−5=15(Simplify both sides of the equation)

5x−5+5=15+5(Add 5 to both sides)

5x=20

x= 4

Step: Substitute4 for x in y=2x−5:

y=2x−5

y=(2)(4)−5

y=3

Answer 2

Answer:

2x-y=5

3x+y=15

1. 5x=20

x=5÷20

x=4

2. 2x-y=5

2×5-y=5

10-y=5

y=5-10

y=5

x=4,y=5