Question

2x + 5y= 18 4x + 20y= -36 Solve and Explain first to get right gets brainliest

Answer 1

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)