Answer:

Step-by-step explanation:
Answer:
x=1
Step-by-step explanation:
5x=5x x=1
Answer:
The answer is 27
Step-by-step explanation:
The reason being, you can solve this 2 ways.
1) Combine like terms, 7a-4a = 3a.
Now just substitute (a=9) into 3a.
3 * (9) = 27.
2) Or just substitute a = 9 into the original expression.
7 * (9) - 4 * (9)
= 63 - 36 = 27
6+(9-1)^2/4 = 22
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Answer:
1/3÷5
=1/3×1/5
=1/15
each child receive 1/15 of cake