two times Antonio's age plus three times sarah's age equal 34. sarah age is also five times antonio age.how old is sarah
#1 - set up a system of equations letting s = sarah's age and a = antonio's age. 2a + 3s = 34 s = 5a #2 - solve using substitution. 2a + 3(5a) = 34 2a + 15a = 34 17a = 34 a = 2 Antonio is 2 years old. s = 5(2) s= 10 Sarah is 10 years old.