Question

IS 4 -3 1-2 -1 4 -5 4 -3 -2 2 3 -2 -3 the piant op steer X=-3 349 3x-2 31-32-4 ya! ya E = 4) 4x + y = 2 x - y = 3

Answer 1

$\text{x = 7 and y = -1}$

Here, we want to solve the system of equations by substitution

From the first equation, we can have an equation in terms of x

We have this as;

$x\text{ = -7y}$

Now, proceed to substitute this into the second equation

We have this as;

$\begin{gathered} 2(-7y)\text{ - 8y = 22} \\ -14y-8y\text{ =22} \\ -22y\text{ = 22} \\ y\text{ = }\frac{22}{-22}\text{ = -1} \end{gathered}$

To get the value of x, what we have to do is to substitute the value of y in the equation we had for x

We have this as;

$\begin{gathered} x\text{ = -7y} \\ x\text{ = -7(-1)} \\ x\text{ =7} \end{gathered}$