show the graph and problem 12 then I can answer.
The age of Susie is 34 years old
<em><u>Solution:</u></em>
Let the age of Chuck be "x"
Given that,
<em><u>Bob is twice as old as Chuck</u></em>
Age of Bob = twice as old as Chuck
Age of Bob = 2x ----- eqn 1
<em><u>Susie is 10 years younger than Bob</u></em>
Age of Susie = Age of Bob - 10
Age of Susie = 2x - 10 ---- eqn 2
<em><u>Given that sum of their ages is 100 years</u></em>
Therefore,
Age of chuck + Age of Bob + Age of Susie = 100
x + 2x + 2x - 10 = 100
5x - 10 = 100
5x = 110
x = 22
Therefore, Age of Susie = 2x - 10 = 2(22) - 10 = 44 - 10 = 34
Thus age of Susie is 34 years old
This is the commutative property of addition. It basically says, x+y=y+x.
To answer your question, 103+21=21+103
To find the value of x, bring the variable to the left side and bring all the remaining values to the right side. Simplify the values to find the result.
Hope this helps