Question 800759
Use Priscilla's age as X, as we do not know.
Since Jack is eleven years older, that adds 11 to her age, which is X + 11
Since their ages equal to 153, on the right side of the equation, it would = 153
Combine these three, and you will get X + X + 11 = 153.
Subtract 11 from both sides, and you will have X + X = 142
Combine like terms (Where all numbers that have a similar ending are added together) and you get 2X = 142
Divide both sides by two, so you can isolate the variable (Getting the X on it's own.)
X = 71
Priscilla's age is 71, and since Jack is 11 years older (X + 11 = 71 + 11),
You will get 82.
Plug in 71 for X, to check your work.
X + X + 11 = 153
2x + 11 = 153
2 (71) + 11 = 153
Therefore, our answers are correct.