64x+80 (42-x)=2880
Solve for x
X=30 coach fare
42-30=12 First-class fare
Answer:
Step-by-step explanation:
So we want to simplify:
Note that this is in the format:
And we know that this is the same as:
Let 2√5 be a and let √3 be b. Thus:
Simplify:
And this cannot be simplified any further.
pooper factor
Step-by-step explanation:
Answer:
The Younger sister is 9
Step-by-step explanation:
x = age of older sister
x - 3 = age of younger sister
4/3 = x/(x - 3)
Solve for x.
4(x - 3) = 3x
4x - 12 = 3x
x = 12
The older is 12, the younger is 12 - 3 = 9