Sederhanakanlah x-2y+(2x-y)-(x-4y).
x - 2y + (2x - y) - (x - 4y)
= x - 2y + 2x - y - x - (-4y)
= x - 2y + 2x - y - x + 4y
= x + 2x - x - 2y - y + 4y
= 1x + 2x - 1x - 2y - 1y + 4y
= (1 + 2 - 1)x (-2 - 1 + 4)y
= 2x + 1y
= 2x + y
x - 2y + (2x - y) - (x - 4y)
= x - 2y + 2x - y - x - (-4y)
= x - 2y + 2x - y - x + 4y
= x + 2x - x - 2y - y + 4y
= 1x + 2x - 1x - 2y - 1y + 4y
= (1 + 2 - 1)x (-2 - 1 + 4)y
= 2x + 1y
= 2x + y