Question

X in x + y = 9 and x - y = 2.5.553.5-5.5

Answer 1

Given that

There are two equations and we have to solve them for the value of x.

Equations are

x + y = 9 and x - y = 2

Explanation -

First, we will substitute the value of y in eq (ii) from eq (i) and then solve for x.

So then,

`\begin{gathered} x+y=9--------(i) \\ y=9-x \\ x-y=2-------(ii) \\ Substituting\text{ y in eq\lparen ii\rparen} \\ x-(9-x)=2 \\ x-9+x=2 \\ 2x=2+9 \\ 2x=11 \\ x=(11)/(2) \\ x=5.5 \end{gathered}`

So option A is correct.

Hence the final answer is 5.5