Question

I dont know the answer to this question I dont know what I can put for the x and the y

Answer 1

• x = -4
• y = 4

Solution:

• => 7x + 6y = -4

4x + 6y = 8

• => 3x = -12
• => x = -4

Now, let's substitute the value of x into an equation to find the value of y.

• 7x + 6y = -4
• => 7(-4) + 6y = -4
• => -28 + 6y = -4
• => 6y = -4 + 28
• => 6y = 24
• => y = 4

Let's check our answer using the second equation.

Check:

• 4x + 6y = 8
• 4(-4) + 6(4) = 8
• => -16 + 24 = 8
• => 8 = 8

Hence, this is proven correct.

Hoped this helped.

`BrainiacUser1357`

Answer 2

(x, y) = (-4, 4)

Explanation:

You find the values of x and y by working the problem using any of the methods of solving simultaneous equations that you have been taught.

Here, you observe that the y-coefficients are the same in each equation. That means you can cancel the y-terms by subtracting one equation from the other.

(7x +6y) -(4x +6y) = (-4) -(8)

3x = -12 . . . . simplify

x = -4 . . . . . . divide by 3

Now, you can substitute this into either equation to find y.

4(-4) +6y = 8

6y = 24 . . . . . . . . add 16

y = 4 . . . . . . . . divide by 6

The solution to this system of equation is ...

• x = -4
• y = 4