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

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)

y = 0.77(x)

step-by-step explanation:

the jacket retains this value after 23% cut or retains 77% of original value. plug original 87 jacket price for x and the remaining value should be y.

answer: -1

step-by-step explanation: