Mathematics
posted by Anonymous .
There are 250 marbles altogether. Johan has 20 more than Mary who has 50 less than John. How many marbles does John have?

Mathematics 
Damon
mary = x
johan = x+20
John = x+50
3 x + 70 = 250
3 x = 180
x = 60 = Mary
x+20 = 70 = johan
x+50 = 110 = John
Respond to this Question
Similar Questions

math
there are 40 marbles in a jar. Chris had 2/5 of the marbles, Sal had 1/8, Tim had 1/10, and Bob, John and Don split whatever was left over evenly. How many marbles did Bob, John and Don split ? 
math
sally has a bag with red,blue, and green marbles. She has twice as many blue marbles as red marbles. She has 5 times as many green marbles as red marbles. Altogether she has 24 marbles. How many of each color marble does she have? 
aig math
The ratio of Tim's marbles to Joe's marbles to Matt's marbles is 8 : 6 : 9. If Tim and Joe have 84 marbles altogether, how many marbles does Matt have? 
math(Ms.Sue)
The ratio of Tim's marbles to Joe's marbles to Matt's marbles is 8 : 6 : 9. If Tim and Joe have 84 marbles altogether, how many marbles does Matt have? 
math
mary has 12 marbles. 3/12 of the marbles are yellow and 2/12 of the marbles are blue.the rest of the marbles are green. how many marbles are green and explain how you know 
Math
John has some marbles. Sally has 5 more than twice as many as John. Ingrid has 4 times as many marbles as John. If the three friends have 96 marbles in all, how many marbles does each person have? 
MATH
MARY HAS 28 BLUE MARBLES AND 30 GREEN MARBLES. JESSICA HAS 48 TIMES MORE MARBLES THAN MARY. HOW MANY BLUE MARBLES DOES MARY AND JESSICA HAVE 28 + n = 48 i just don't know how to set it up 28 x n =48 28 = 48  n 
Math
john has 28 marbles and sue had 157 marbles, after each added the same amount, sue had 4 times more than john. how many did they each add? 
Math
A bowl has red,green and blue marbles.There are 95 red marbles.the nuber of blue marbles is 5 timesthe number of green mables altogether red and green marbles are 189 less then blue marbles .how may marbles are there in total 
Maths
A quarter of Nibha's marbles are blue.If she has 12 marbles,how many marbles does she have altogether?