6 grade math
posted by Jessica
Please I just need help on the set up teacher wants a guess and check table.
Thomas is thinking of a number. If he doubles his number and subtraction 27, the results is 407. Of what number is Thomas thinking?

Alex
So we know that the result of doubling a number and subtracting 27 gives 407. Since your teacher wants a guess and check table, let's just start guessing numbers around the 200 mark, since we know double the number at some point.

Reiny
no need for guessing, just reverse the steps:
the first thing we did was multiply by 2, then subtract 27 to get 407
So everything done in reverse:
( 407+27) divide by 2
= 434 ÷ 2
= 217
Respond to this Question
Similar Questions

MATH!!
(1)At the begining of her math class, Mrs. Reno gives a warmup problem. She says, "I am thinking of a number such that 6 is less than the product of 7 and this number is 85." Which number is she thinking of? 
math 1st. grade
Adding Doubles just means adding the same numberr to itself. Like 2+2=4, 3+3=6, So addind doubles to 18 would be 0+0=0, 1+1=2, 2+2=4, and so forth up to 9+9=18. Maybe this will help you solve the problem. I have a work sheet that has … 
11th grade math
I Need help with the following question: If moe has 3x as many singles as larry, and Larry has 4X as many doubles as curly. How many singles and doubles did they each have. They only got singles and doubles. They all had the same number … 
3rd grade
what is a set of related addition and subtraction number sentences useing the same numbers 
3rd grade Math
Representations  Draw a number line. Make sure the following numbers are on your number line: 1,472; 1,560; 1,481. Are we over thinking this problem? 
Math
Guess and Check is an important problemsolving strategy. Use guess and check to solve each puzzle. a) A number times itself is 100. What is the number? 
Computer Science
Answer the following question without running the code. The procedure isMyNumber is used to hide a secret number (integer). It takes an integer x as a parameter and compares it to the secret number. It returns: 1 if the parameter … 
6 grade math
I need help in the setup teacher wants a guess and check table for the word problem. Just the set up I need help on . Please a wood board 156 cm long is cut into three pieces.the two longer pieces are the same length and are 15 cm … 
6 grade math
Please I need help on just the set up using a guess and check table. Karina has some dimes and quarters she has 8 more dimes and quarters and the collection of coins is worth $7.45. How many dimes and quarters does Corona have? 
math
Thomas is thinking of a number, if he doubles his number and subtracts 27, he gets 407. Whats his number?