Answer:
Yes
Step-by-step explanation:
1/8-10(3/4-3/8x)+5/8x
1/8-(30/4-30/8x)+5/8x
1/8-30/4+30/8x+5/8x
Lcm is 8
1-60+30x+5x/8
-59+35x/8
Factorise
-1/8(59-35x)
So when comparing the two,they are observed to be the same
 
        
             
        
        
        
It will take 12.5 to finish 30 and I took 6x5 got 30 the I took 5x2.5 and got the answer
        
                    
             
        
        
        
Answer:
3/2 x +1 = 5/4x - 5
3/2 x+1 =5/4
x−5
Step 1: Subtract 5/4x from both sides.
3/2 x+1−5/4
x=5
4x−5−5/4x
1/4x+1=−5
Step 2: Subtract 1 from both sides.
1/4x+1−1=−5−1
1/4
x=−6
Step 3: Multiply both sides by 4.
4*(1/4x)=(4)*(−6)
x=−24 Mary has 24 shells 
Answer:
-x=−24
x = 24 shells
Step-by-step explanation:
1.   2 3/4 x 16 = 44 + 6 = 50 shells   x= 16    
2 3/4 x 24 = 66 + 6 = 72 x = 24
We see the side workings in bold as if Mary has 24 and Nancy has 1x more 
Then Nancy 24+24 = 48 where Gracie 5 x 24 = 120 and we have 72-48 = 24 and 120-72 = 48 being the same as Nancy. You can ignore or check the rest in explanation.
                            2 3/4 x 18 = 49 1/2 + 6 = 55 1/2  x= 18
2.  2 3/4 x 16 = 44 -4 = 40 shells  x = 16  2 3/4 x 24 = 66 - 4 = 62   x = 24
                             2 3/4 x 18 = 49 1/2 - 4 = 45 1/2   x = 18
3.   2  3/4 x 16 = 44 + 4 = 48 shells x = 16  2 3/4 x 24 = 66 + 4 = 70  x = 24                 
2 3/4 x 18 = 49 1/2 + 4 =53 1/2  x = 18