Answer:
answer is for x value 2/3
Answer:
Step-by-step explanation:
Isolate then solve for x
Assume the secret number is x.
"Al doubled the number and added 15 to the result. He got 51."
means 2x+15=51
solving for x:
2x+15=51
2x=51-15
2x=36
x=18
"Beverly did the same operations with their number, but in the reversed order." means she first added 15 to the number, then she doubled the result,
that is she performed the operation:
First: x+15
then: 2(x+15)
since we found x=18, then we have 2(x+15)=2(18+15)=2*33=66
Answer: 66
If AB is 15, then BC is 15*9/5=27. Therefore, we can write the equation 5x+2=27.
We subtract by 2 to find that 5x=25, and divide by 5 to see that x=5.
Everyone of them except for 20x squared
