Solve the simultaneous equations 5x+2y=18 4x-2y=0

Since the order of equations makes us able to add al the like terms 5x + 4x;      2y + (- 2y); 18 + 0:

             +

             =

(We got that answer by summing the two equations. Note that 2y + (-2y) cancels out since it results in 0)

→ we take 9 to the right side of the equation

→ we solve for 18 / 9

→ final answer

Answer for x:

Now to solve for y we substitute all the x's by 2 in any of the equations you like, I'll choose the first one:

→ we solve for 5(2)

→ we take 10 to the right side of the equation

→ we solve for 18 - 10

→ we take 2 to the right side of the equation

→ we solve for 8 / 2

→ final answer

Answer for y:

Hope it helped,

BioTeacher101

(If you have any questions, feel free to ask them in the comments)