I can answer these problems
3x-4 is the answer, you have to see that if its 3 times her nieces age it would be 3x and if its four less than that it is 3x-4
The answer is a.
Point A and point B
Answer:
D. x=12
Step-by-step explanation:
Add 17 to the other side of the equal sign
x=17+5
Then add 17 and -5
X=12