<span>In solving a rate of increase problem,the original value is always the percent of new value. Hope this answers the question. Have a nice day. Feel free to ask more questions. Thank you.</span>
        
             
        
        
        
Answer:
x =  19
Step-by-step explanation:
1. add 31 on both sides (you wanna get the "x" by itself)
ex: 2x - 31 = 7
           +31   +31
2. the 31s cancel each other out so now you add 31 + 7
2x       =  7
            +31
___________
              38
3. divide 2 on both sides so the 2s cancel each other out and only the x is left
ex: 2x / 2 = x         38 ( the 38 stands alone) 
4. now divide 38/2 and you have your answer
X= 19
 
        
             
        
        
        
Answer is 14
Step by step explanation 
The amount is same so
64+8w=92+6w
2w=92-64=28
w=14 => after 14 weeks