Answer:
-n+33
Step-by-step explanation:
1. do distributive property
2. 7y+21-8n+12
3. combine like terms
4. 7n and 8n both are like terms so, 7n-8n= -1n or -n
5. 21 and 12 are like terms so, 21+12= 33
answer is: -n + 33 or -1n + 33
Answer and Step-by-step explanation:
[tex]\Huge \boxed{Answer: 7y+33-8n}[/tex]
Step 1: Expand 7(y+3) :
[tex]=7y+21-4(2n-3)[/tex]
Step 2: Expand -4(2n-3)
[tex]=7y+21-8n+12[/tex]
Step 3: Simplify 7y+33-8n
[tex]=7y+33-8n[/tex]
