Question

13) Solve the following sets of simultaneous equations
(i) x+y= 4 ; 2x - 5y = 1.
(ii) 2x + y = 5:3x-y = 5
(iii) 3x - 5y=16; x-3y=8
(iv) 2y - r=0; 10x + 15y = 1​

Answer 1

Step-by-step explanation:

(i) x+y=4 is equation 1.

2x-5y=1 is equation 2.

• x=4-y

Put x in eq 2.

• 2x-5y=1

2(4-y)-5y=1

8-2y-5y=1

8-7y=1

-7y=1-8

-7y=-7

y=1

put y in any eq.

x+y=4

x=4-1

x=3

You can solve the others the same way.