Question

solve the equation 3 x minus y is equals to 3 and 7 x + 2 Y is equals to 20

Answer 1

3x-y=3 7x+2y=20 2(3x-y)=3× 2=6 6x-2y=6 7x+2y=20 subtracting both sides 7x+2y-(6x+2y)=20-6 7x+2y-6x-2y=14 x=14

Answer 2

Answer:

Step-by-step explanation:

3x-y=3

7x+2y=20

2(3x-y)=3×2=6

6x-2y=6

7x+2y=20

subtracting both sides

7x+2y-(6x+2y)=20-6

7x+2y-6x-2y=14

x=14

3×14-y=3

42-y=3

y=42-3=39