2x + 5y = 18

4x + 20y = - 36

Solve and Explain first to get right gets brainliest

Answer: Solution x=27, y-7.2

(1) 2x + 5y = 18

(2) 4x + 20y = - 36

Multiply equation (1) by - 2:

(1) - 4x - 10y = - 36

(2) 4x + 20y = - 36

Add (1) to (2):

(2) 4x + 20y - 4x - 10y = - 36 - 36

-> 10y = - 72

-> y=-7.2

Use the value for y in equation (1) to get x:

(1) 2x + 5 (-7.2) = 18

2x - 36 = 18

2x = 54

x = 27

Solution (x, y) = (27,-7.2)