Question

Solve the following simultaneous equations graphically 3x-4y=-7;5x-2y=0

Answer 1

3x-4y = -7  ------  1
5x-2y = 0   ------  2

1 ->        3x-4y = -7
 2x 2-> -10x+4y = o
              -7x       = -7  so, x=1

3(1) -4y = -7
-4y = -7-3
-4y = -10
y = -10 / -4
so, y = 5/2 or 2.5     (x=1, y=5/2)