Question

if x + 1 = y - 8 and x =2y, then the value of x + y is​

Answer 1

On solving we get
y=-9
So x=-18
x+y=-27

Answer 2

Answer:

Step-by-step explanation:

x+1=y-8,-eq 1

x=2y- eq 2

Substituting x value in  eq 1,

2y+1= y-8,

y=-9.

Substituting y=-9 in eq 2

x=-18

x+y=

-18+(-9)= -9

Therefore,

x+y= -27