Question 1204684
Mary’s age is 3 more than twice her brother’s age.

Let brother's age be x years

Mary's age will be (2x+3)

  The sum of their ages is 33.  What is Mary’s age?

x+2x+3=33

3x+3=33
subtract 3 from both sides

3x=30
divide by 3
x=10

Brother's age = 10 years
Mary's age = 2x+3 = 2(10)+3= 23 years