HELP ME PLZZZZZ:

Question

William and Grace had $87. Grace and Siti had $115. If William had 3/7 of Siti's amount, how much did Grace have

Answer 1

 William (W)  + Grace (G) = $87. 

Grace(G) + Siti (S) + $115 

William (W) = 3/7 (S) 

Grace = ?

w+g =87 

g+s = 115 

3/7s + g = 87 

s      + g =115 

g = 115 - s 

3/7 s + (115 - s)  = 87 

3/7 s - s = 87 - 115

3s - 7s / 7 = -4/7s = -28

4/7s = 28 

s= 28/4/7

s= 196/4

s= 49 

 

g +s = 115 

g+ 49 + 115 

g= 115 - 49 

g = 66 

Grace had $66