Hello,

there are a lot of different ways to solve such a system of equations. Here is one:

A: x + 2y = 4 ===> x = 4 - 2y

B: 3x - 4y = 7 Now plug in the term for x from equation A:

3(4 - 2y) - 4y = 7

12 - 6y -4y = 7

-10y = - 5

y = ½Plug in this value into equation A:

x= 4 - 2*½ =3