Answer:
1. 6y
2. 4y+2x
3. 5x
4. 4y+x
5. -7x+3y
6. 3x+7y
Step-by-step explanation:
Combine like terms:
1. y+y+y+y+y+y=6y
2. y+y+y+y=4y, x+x=2x
3. 4y-5y+y=0, 2x+3x=5x
4. y+y+y+y=4y, x+0=x
5. 8y-5y=3y, -5x-2x=-7x
6. -2y+9y=7y, 4x-2x+x=3x
