51 SLICES OF PIZZA, KAREN ATE 3 TIMES MORE THAN CRISTIAN. RJ ATE 1/2 OF WHAT CRISTIAN ATE. WHEN DONE 5 SLICES LEFT

Question

 I NEED TO KNOW HOW MANY SLICES CRISTIAN ATE. I NEED TO KNOW WHAT FORMULA TO SOLVE 

 

Answer 1

We know the least about Chrisitan.

Chrisitan ate X slices.

 

Karen + Chrisitan + RJ + 5 = 51

 

3x     +     x        + 1/2*X + 5 = 51

 

4.5 X + 5 = 51

 

4.5 X = 46

 

45 X = 460

 

x  = 460/45 = 92/9 = 10 and 10/45

 

Karen = 3 (92/9) = 92/3 = 30 and 2/3

 

RH = 1/2(92/9) = 92/18 = 46/9 = 5 and 1/9

 

Adds them together:

        92/3 + 92/9 + 46/9 = (276 + 92 + 46)/9

                                      =  414/9

                                       = 46