Question

Which ordered pair is the solution to the system of equations?


{−3x+4y=−20y=x−4





(−4, −8)


(−2, −6)


(4, 8)


(0, −5)


please answer :)

Answer 1

Answer:

x = 8/7 and y = 1/7 but I can't find them in the possible answers.

Step-by-step explanation:

-3x+4y = -20y = x-4

from this equation 2 equations can be drawn that is:

-3x+4y = -20y _____(1)

x-4 = -20y ______(2)

From eqn(2)

x = -20y + 4

Solving simultaneously:

Substituting the value of x into eqn(1)

-3(-20y + 4) + 4y = -20y

60y - 12 + 4y = -20y

Grouping like terms

64y + 20y = 12

84y = 12

y = 1/7

x = -20(1/7) + 4

x = 8/7