Answer:

Step-by-step explanation:



Answer:
12 pencils
Step-by-step explanation:
let no. of pencils bought be x.
54 - 0.75x - 2.50 = 42.50
9 = 0.75x
x = 12
Topic: algebraic equations
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Answer:
6
Step-by-step explanation:
replace the variable with the information provided which will give you
x=4+6-4
solve
answer:6
Answer:
its B
2×x=2x
(x+1)×(x-1)=x²-x+x-1=x²-1