Answer:

Step-by-step explanation:
One of the methods is to first split the face and the denominator of the fraction into first bases:

Let's simplify:

Equation: 450 = 128 + 150 + n
work:
1st step:
128+150 = 278
2nd step:
450-278 = 172
answer: 172
3rd step (checking) :
450 = 128 + 150 + 172
450 = 278 + 172
450 = 450
Answer:

Step-by-step explanation:

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Answer:
C. 5units
Step-by-step explanation: