ong>Answer:

Q2)=Solve:

(i)=Here, the value of y is 24.

(ii)=Here, root5/3<3/root7

(iii)=Here, two SOLUTIONS of X and Y are (1, 6) and (2, 5).

Q3.)=Solve:

(i)=Here, value of x=2 and of y=1.

(ii)=In this question, The present age of Priyanka is 20years and of Deepika is 14years.

Step-by-step explanation:

Q2.)Solve:

(i)=As given in question,

=6:5=Y:20

So, 6/5=Y/20

On Cross-multiplying between both, we get,

=5Y=120

=Y=120/5

=Y=24 (Answer).

(ii)=On comparing both NUMBERS, we get,

=root5/3=3/root7

On Cross-multiplying between both, we get,

=root35 =9

Where, root35<9

So, root5/3<3/root7 (Answer).

(iii)=As given equation is,

=X+Y=7

Let here, the value of X be 1,

=1+Y=7

=Y=7-1

=Y=6

Now, by TAKING value of X as 2,

=2+Y=7

=Y=7-2

=Y=5

So, by this we get the solution as, (1, 6), (2, 5)

Q3.)=Solve:

(i)=As given equations are=2x+y=5, 3x-y=5

Now, by applying elimination method and adding both equations, we get,

=(2x+y=5) -(1st)eq.

=+(3x-y=5) -(2nd)eq.

So, we get, =2x+3x=5+5

=5x=10

=x=10/5

=x=2

Now, by PUTTING value of x in (1st)eq., we get,

=2×(2)+y=5

=4+y=5

=y=5-4

=y=1 (Answer)

(ii)=Total sum of ages of Priyanka and Deepika=34years

=Priyanka is elder to Deepika by=6years

=So, Let age of Priyanka and Deepika be x and y respectively.

=Now, =x+y=34 -(1st)eq.

=x-y=6 -(2nd)eq.

Now, by applying elimination method and adding both the equations, we get,

=(x+y=34)

=+(x-y=6)

So, we get, =x+x=34+6

=2x=40

=x=40/2

=x=20

Now, By putting value of x in (1st)eq., we get,

=20+y=34

=y=34-20

=y=14.

Hence, The present age of Priyanka is 20 years and Deepika is of 14years.

Thank you.