Simplify -81x+19y-30z+6y+80x+x-25y

$- 81 x + 19 y - 30 z + 6 y + 80 x + x - 25 y$

Add $- 81 x$ and $80 x$ .

$- x + 19 y - 30 z + 6 y + x - 25 y$

Combine the opposite terms in $- x + 19 y - 30 z + 6 y + x - 25 y$ .

Add $- x$ and $x$ .

$19 y - 30 z + 6 y + 0 - 25 y$

Add $19 y - 30 z + 6 y$ and $0$ .

$19 y - 30 z + 6 y - 25 y$

Add $19 y$ and $6 y$ .

$25 y - 30 z - 25 y$

Combine the opposite terms in $25 y - 30 z - 25 y$ .

Subtract $25 y$ from $25 y$ .

$- 30 z + 0$

Add $- 30 z$ and $0$ .

$- 30 z$