English Assignment Mathematics for Junior High School 2 Chapter I. Algebra Page 37, number 2. The sum of Dad's and Mom's ages is 70 years. Mom is 2 years younger than Dad. Next year, double of Mom's age is 70 years. How old are they now? Answer: From the question, They can be symbolic, Dad by x and Mom by y. So we can get operation of algebraic expressions: i. x+y=70 ii. x=y-2 iii. 2(x+1)=70 Then we can use the operation algebraic to find the value of Dad's and Mom's age. we can calculate first operation(i) and second operation(ii). you can insert second operation to first operation, y-2+y=70 and is equal to 2y=72, ...
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