Given 2x-y = 3, then the value of 1-4x + 2Y How much is y, how much is x, how to come, I'm a novice, how to do when encountering questions like this, what tips,,,,, good answers, additional points

2x-y=3
Multiply both sides by - 2
-4x+2y=-6
Add one to both sides
1-4x+2y=-5

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