simultaneous equations
x + 2y = 4
3x - 4y = 7
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 = ½ Plug in this value into equation A:
x = 4 - 2*½ = 3