Question

x+2y=7
3x+y=4 by sustitution method

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Answer 1

Step-by-step explanation:

➡Given here.

↪x+2y= 7.............(1).

↪3x+y= 4.............(2).

➡By (1). , x = 7-2y , keep in (2).

↪3(7-2y)= 4.

=> 21-6y= 4.

=> -6y = 4-21.

=> y = -17/(-6)

=> y = 17/6.

By (1).,

x + 2× 17/6= 7

=> x = 7 - 17/3.

=> x ° (21-17)/3.

=> X= 4/3.

➡Thus:-

♠Values of x = 4/3.

♠Values of y = 17/6.

➡Thank you.

@Abhi❤❤

Answer 2

Step-by-step explanation:

x+2y=7 ..........(1)

3x+y=4 ..........(2)

From eq (1), we obtain

x=7-2y ......... (3)

Put eq (3) in (2)

3(7-2y)+y=4

21-6y+y=4

21-5y=4

21-4=5y

17=5y

y=17/5

Put y=17/5 in eq (1)

x+2×17/5=7

x=7-34/5

x=1/5

Hence, x=1/5 and y=17/5