Question

sally is 1 year older than 3 rimes the age of joe. chris is 5 years younger than 6 times the age of joe, if sally and chris are the same age , how old is joe

Answer 1

6x - 5 = 3x + 1
-3x -3x
————————
3x - 5 = 1
+ 5 + 5
————————
3x = 6
—- —-
3 3

x = 2
Joe is 2 years old.

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Check : substitute x.

6(2) - 5 = 3(2) + 1
12 - 5 = 6 + 1
✔️
7 = 7