Question

Solve the simultaneous equations
5 x − y = 8
7 x + 4 y = 22​

Answer 1

Answer:

Solve the equation by substitution method ;

$5x - y = 8 \\ y = 5x - 8$

$7x + 4y = 22 \\ 7x + 4(5x - 8) = 22 \\ 7x + 20x - 32 = 22 \\ 27x - 32 = 22 \\ 27x = 22 + 32 \\ 27x = 54 \\ \\ x = \frac{54}{27} \\ \\ x = 2$

$y = 5x - 8 \\ y = 5(2) - 8 \\ y = 10 - 8 \\ y = 2$

(x , y ) —> ( 2 , 2 )

I hope I helped you^_^

Answer 2

Answered and solved !!!

You can also use the above method. This is also a similar type method. Please check the attached answer image.

Hope it helps you...

Benjemin.

Happy Studying!!!