Question

The value of x and y in the solution of equations x+y=7 and x-y= 3 respectively is : *
3 and 4
5 and 2
2 and 5
6 and 3

Answer 1

Answer:

$x + y = 7 \\ x - y = 3 \\ = x + x + y + ( - y) = 7 + 3 = 10 \\ = 2x = 10 \\ = x = \frac{10}{2} \\ = x = 5 \\ = x + y = 7 \\ = 5 + y = 7 \\ = y = 7 - 5 \\ = y = 2$