150 + 20x, where x is the number of cellphones sold
the original price is "x", or 100%.
but we know that if we reduce "x" by 20%, namely 100% - 20% = 80%, the 80% of "x" is really £50, what is "x" or the 100% anyway?

Answer:
Step-by-step explanation:
the square root of 12 is 3.4 so the answer is 3.4
Answer:
40:70 becomes 20:35 which becomes 4: 7.
The answer is 4:7
Step-by-step explanation: