Question 753887
Write an equation for each statement
:
Jeff is 7 years older than Marty.
j = m + 7
or
j - m = 7
:
The sum of their ages is 71.
j + m = 71
:
Use elimination here, add the two equations
j - m = 7
j + m = 71
------------adding eliminates m, find j
2j = 78
j = 78/2
j = 39 is Jeff's age
:
 How old is Marty? I'll let you find this