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Really need help understanding! Very stuck on this question! ABCD is a parallelogram. Find the value of x and y.

Answers:

A. x = 35; y = -4
B. x = 10; y = 19
C. x = 4; y = 2
D. x = 3; y = 4

Really need help understanding Very stuck on this question ABCD is a parallelogram Find the value of x and y Answers A x 35 y 4 B x 10 y 19 C x 4 y 2 D x 3 y 4 class=

Respuesta :

choixongdong
2x + y = 10
x + 4y = 19 so x = 19 - 4y

substitute  x = 19 - 4y into 2x + y = 10

2x + y = 10
2(19 - 4y) + y = 10
38 - 8y + y = 10
-7y = -28
    y = 4

x = 19 - 4y
x = 19 - 4(4)
x = 19 - 16
x = 3

x = 3 and y = 4

answer
D. x = 3; y = 4

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