Question

If x - 3 = y + 4 and 2x + 1 = 7y, then ________.​

Answer 1

Step-by-step explanation:

x= y+7

substituting this in eq.2

2( y+7) + 1 = 7y

2y + 14 +1 = 7y

5y = 15

y = 3

substituting value of y in eq. of x

x= 7+3 = 10.

Answer 2

Answer:

x-3 = y+4 -(1)eq

2x+1 = 7y - (2) eq

from equation (1)

x = y+4+3

x = y+7 -(3) eq

put the value of x in equation(2)

2x+1 = 7y

2(y+7)+1 = 7y

2y+14+1 = 7y

2y+15 = 7y

15 = 7y-2y

15 = 5y

y = 15/5

y = 3

put the value of y in equation(3)

x = y+7

x = 3+7

x = 10

[ x = 10 , y = 3 ]