SOLUTION: marks dad is 3 times as old as mark . The sum of their ages is 48 , how old is mark?

Question 536222: marks dad is 3 times as old as mark . The sum of their ages is 48 , how old is mark?
Found 2 solutions by oberobic, algebrahouse.com:
Answer by oberobic(2304) (Show Source): You can put this solution on YOUR website!
Dad = 3*Mark
D = 3M
.
D+M = 48
so
D = 48-M
.
substitute
.
48-M = 3M
48 = 4M
4M = 48
M = 12
.
D = 3M
D = 3*12 = 36
.
Answer: Mark's dad is 36, and Mark is 12.
.
Done.
Answer by algebrahouse.com(1659) (Show Source): You can put this solution on YOUR website!
"marks dad is 3 times as old as mark . The sum of their ages is 48 , how old is mark?"

x = Mark's age
3x = Mark's dad's age {Mark's dad is 3 times Mark}

x + 3x = 48 {sum of ages is 48}
4x = 48 {combined like terms}
x = 12 {divided both sides by 4}

Mark is 12

For more help from me, visit: www.algebrahouse.com

RELATED QUESTIONS
1st question) marks dad is 3 times as old as mark . The sum of their ages is 48 , how old (answered by josmiceli)
mary is half as old as mark the sum of their ages is 51. How old are they... (answered by longjonsilver,alconerajaydee@yahoo.com)
mary is half as old as mark the sum of their ages is 51. how old are they now? (answered by ikdeep)
Mark is two years older than Juan. Jerman is twice as old as Mark. Coral is twice as... (answered by josgarithmetic)
Mark is two years older than Juan. Jerman is twice as old as Mark. Coral is twice as... (answered by josgarithmetic,MathTherapy)
Mark is twice as old as Dave. In four years the sum of their ages will be 26. How old is... (answered by JBarnum)
Kevin is now four times as old as mark. Five years ago, The sum of their ages was 45.... (answered by MathLover1,MathTherapy)
marks mother is 32 years older than mark. the sum of their ages is 66. how old is... (answered by Cromlix)
Leo is three times older than Mark. If the sum of their ages is 32, then how old is... (answered by itxmenaved,ikleyn)