SOLUTION: When twice a nember plus three is multiplied by five, it is equal to the product of three times the number minus one, and seven. Which of the following is the number? A. 2 B

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Question 118838: When twice a nember plus three is multiplied by five, it is equal to the product of three times the number minus one, and seven. Which of the following is the number?
A. 2
B. 2.4
C.4
D. 4.2
Answer by MathLover1(3376) About Me  (Show Source):
You can put this solution on YOUR website!
twice a number x plus three multiplied by five:
%282x+%2B+3%295
is equal to the product of three times the number minus one, and seven
+%283x+-+1%29+7
So, we will have

%282x+%2B+3%295+=%283x+-+1%29+7+
10x+%2B+15+=+21x-7………. move 15 to the right and 21x to the left
10x+-21x=+-15-7……….
-11x++=+-22……..divide both sides by -1
-11x%2F-1++=++-+22%2F-1……..
11x++=++22……..
x++=++22%2F11……..
x++=+++2….
So, your answer is A