Question

In the equation 2x+y=7, find the value of (I) y if X=2 and (ii) X if y =-1.​

Answer 1

Step-by-step explanation:

equation : 2x + y = 7

(I) when x=2 ;

2×(2) + y = 7

4 + y = 7

y = 7 - 4

y = 3

(II) when y = -1

2x + (-1) = 7

2x = 7 + 1

2x = 8

x = 8/4

x = 2