Answer:
the first option
Step-by-step explanation:
Given
Ax + By = C ( subtract By from both sides )
Ax = C - By ( divide both sides by A )
x = 
Answer:
9
Step-by-step explanation:
;-;
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
Answer:
(x - 9)2 Step-by-step explanation:
Please find attached photograph for your answer.