Question

can u help me please i dont get what to do

Answer 1

Answer:

$x\text{ = -7 and y = -4}$

Explanation:

Here, we want to solve the given set of linear equations simultaneously by combination

What we have to do is to eliminate the terms

We start by multiplying the first eqaution by 2 and the second by 5

We have this as:

$\begin{gathered} 10x-14y=\text{ -14} \\ -10x+15y=\text{ 10} \end{gathered}$

We can now proceed to add the terms together

$\begin{gathered} y\text{ = -14 + 10} \\ y\text{ = -4} \end{gathered}$

To get x, we have to eliminate y

We multiply the first equation by 3 and the second by 7

We have this as:

$\begin{gathered} 15x-21y=-21 \\ -14x+21y=14 \end{gathered}$

Now, add both equations, we have:

$x\text{ = -21+ 14 = -7}$