Question

como resolver x=2y e 2x-5y=3

Answer 1

/ x = 2y
\ 2x - 5y = 3

2.(2y) - 5y = 3
4y - 5y = 3
- y = 3
y = - 3

x = 2y
x = 2.(-3)
x = - 6

Answer 2

{x = 2y}

2x - 5y = 3
2.2y - 5y = 3
4y - 5y = 3
-y = 3
.............
y = -3
.............