Fan + Medal
Catie is 3 years older than her brother. The sum of their ages is no more than 31.
Write an inequality that can be used to represent this situation, where x represents Catie's brother's age. What is the oldest age Caties's brother can be?

Question

Fan + Medal  
Catie is 3 years older than her brother. The sum of their ages is no more than 31. 
Write an inequality that can be used to represent this situation, where x represents Catie's brother's age. What is the oldest age Caties's brother can be?

whovianchick · Answer

well, think of Catie as C and her brother is X.
c=x+3, c+x≤ 31
substitute x+3 in for c, since we know they mean the same thing:
x+x+3≤31
Now simplify:
2x+3≤31
Subtract 3 from both sides, to isolate x.
2x≤28
And divide both sides by 2 so you only have one x.
x≤14
There's your inequality, and Catie's brother could be a maximum of 14 years old.

whovianchick · Answer

Medal?

beaaaaberry · Answer

Thank you sooo much!! You're so great ^-^

whovianchick · Answer

No prob! This stuff is easy for me :)