Marbles math problem

Question

_{David and Joseph have a total of 328 Marbles. Matthew and David have 176 marbles. Joseph has 5 times and his many marbles is Matthew. How many marbles does David have}

Answer 1

D + J = 328

 

M + D = 176

 

J = 5M

 

Substituting the third equation into the first:

 

D + 5M = 328

M + D = 176

 

Subtracting the bottom equation from the top:

 

5M +D - d - M = 328 -176

 

4m = 152

 

m=38

 

THen david has 176-38 = 138

 

Joseph has 5 x 38 = 190