Question

Solve the simultaneous equations 4 x + 3 y = − 18 − 4 x + 2 y = − 17 what is x what is y

Answer 1

Answer:

x = -37/20 = 1.85

y = 9.6 / 3 = 3.2

Step-by-step explanation:

Hello✌️

4x + 3y = - 18 - 4x + 2y

⇒ 4x + 4x + 3y - 2y = - 18

⇒ 8x + y = - 18

⇒ y = - 18 - 8x

Now,

4x + 3y = - 17

4x + 3( - 18 - 8x ) = - 17

⇒ 4x -54 - 24 x = - 17

⇒ 4x - 24x = 54 - 17

⇒ -20x = 37

⇒ x = -37/20 = 1.85

So,

4x + 3y = - 17

4(-37/20) + 3y = -17

-37/5 + 3y = - 17

3y = (37/5) - 17

3y = 48/5

y = 9.6 / 3

y = 3.2

Hope this helps ✌️