Question

7x — 3y = 20
y = 5х – 4
x=
y=

Answer 1

Answer:

x = -1

y = -9

Step-by-step explanation:

7x - 3y = 20

7x - 3(5х – 4) = 20

7x - 15x + 12 = 20

-8x = 20 - 12

x = 8/-8

x = -1

7x - 3y = 20

7(-1) - 3y = 20

-7 - 3y = 20

-3y = 20 + 7

-3y = 27

y = 27/-3

y = -9