Question

Solve the following sets of simultaneous equations
x + y = 4; 2x - 5y = 1

Answer 1

Step-by-step explanation:

x+y=4

2x-5y=1

multiply by 5 in eqn 1

5x+5y=20

let,

5x+5y=20

2x-5y=1

5y 5y get cancel

7x =21

X=3

ans is x=3

put x=3in eqn 1

x+y=4

3+y=4

y=4-3

y=1