Question

If x+y=10 and x =y+1 find x ?

Answer 1

X+Y=10
X-Y=1
(+Y AND -Y gets cancelled on adding the two equations -)
2x=11
X=11/2
=5.5or 5 1/2
To check ur answer
U can find the value of Y by substituting the equation with the value of x 9(I.e 11/5and then check ur answer if LHS=RHS
HOPE l HELPWD H

Answer 2

x+y=10
x=y+1
substitute the valu in x+y=10
               y+1+y=0
                     2y=10-1
                     2y=9
                      y=9/2=4.5
                       x=y+1=4.5+1=5.5
                        x+y=10,x=5.5,y=4.5
                            5.5+4.5=10
                                  Hence Proved