Question 939003
A store stocks pine and spruce seedlings in approximately the ratio of 7:2
let x be the no of spruce seedlings to be ordered 

   7:2  = 24:x
 {{{ 7/2   =24/x}}}
  multiply with x on both sides
  {{{ (7/2)* x   =(24/x)*x}}}
         {{{ 7x/2  = 24}}}
         multiply with 2 on both sides
           {{{ (7x/2) *2 = 24*2 }}}
           {{{ 7x   = 48}}}
           divide with 7 on both sides
 {{{ 7x/7 = 48/7}}}
         {{{ x  =  6.85 }}}
                x= 7 ( rounding off to nearest whole number )
 Result:  no of spruce seedlings to be ordered   = 7