Answer :
4x - 10y = 12
2 (2x - 5y) = 12
2x - 5y = 12 / 2
2x - 5y = 6
This is the real answer.
Now,
if you want to find "x", it will be,
2x - 5y = 6
2x = 6 + 5y
x = (6 + 5y) / 2
And,
if you want to find "y", it will be,
2x - 5y = 6
5y = 2x - 6
y = (2x - 6) / 5
2 (2x - 5y) = 12
2x - 5y = 12 / 2
2x - 5y = 6
This is the real answer.
Now,
if you want to find "x", it will be,
2x - 5y = 6
2x = 6 + 5y
x = (6 + 5y) / 2
And,
if you want to find "y", it will be,
2x - 5y = 6
5y = 2x - 6
y = (2x - 6) / 5
