Multiply everything in the parenthesis by a.
ac + ab = d
Subtract ab from both sides.
ac = d - ab
Divide a on both sides.
c = d - ab / a
Hope this helps!
        
             
        
        
        
1. 
5u - 2u = 3u (diff. between longest and shortest)
3u = 87cm
1u = 87cm ÷ 3 = 29cm
5u + 4u + 2u=11u
11u = 11 x 29cm = 319cm
Ans: 319cm
2.
9u = 1350
1u = 1350 ÷ 9 = 150
6u + 5u = 11u
11u = 11 x 150 = 1650
Ans: 1650
        
             
        
        
        
Step-by-step explanation:
Line is passing through the points:
 
 
Equation of line in two point form is given as:

 
        
             
        
        
        
Well capacity is how much space u can put in an object something is and ounces is the measure of how much is in so the capacity can be like 5 ounces