Question

? Solve the simultaneous equations
5x + 2y = 16
x + 2y = 4

Answer 1

take away the two equations to get:
4x = 12
x = 3

Substitute the x into one of the equations:
3 + 2y = 4
2y = 1
y = 1/2

Answer 2

cancel y to get x which will be 3 then use answer of x to get y by substituting x and solve to get y 1/2