Hello!
You can only combine numbers with the same variable
4r - 16r = -12r
5s + 3s = 8s
The answer is -12r + 8s
Hope this helps!
Answer:
= 
Step-by-step explanation:
<u><em>Explanation:-</em></u>
Given that

= 
= 
= 
= 
Answer:
35/2 or 17.5 or 17 1/2
Step-by-step explanation:
Answer:
1=30
2=90
3=21
4=39
5=39
6=24
7=24
8=66
9=66
10=21
11=60
12=120
13=60
14=120
15=48
16=105
17=27
18=129
19=51
20=129
21=51
Step-by-step explanation:
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