# 7th grade pre alegebra homework help!?

Topic: 7th grade pre alegebra homework help!?
May 24, 2019 / By Braiden
Question: Ex: The sum of three times a number and 25 is 40. Find the number. 3x + 25= 40 3x + 25 - 25= 40 - 25 3x= 15 x= 5 The number is 5. I don't understand how to find the solution. I thought the solution was what x equals, but I guess not. Here are some problems you can help me figure out : Equation: x- -3 (neggative 3)= 8 WHATS THE SOLUTION? Is it x=5?

yes it is x=5 because think about the way the question is worded. the sum of 3 times a number 3 times x(a number) and 25 . you add 25 because 3 times a number and 25 should equal 40 so it will be 3x + 25 = 40 you subtract 25 from both sides. you get 3x = 15 the divide by 3. you get 3x/3 = 15/3 . you simplify the fractions and get x=5
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Stephania
For the equation x- -3 = 8, you solve for x two negatives equals a positive so x+3 = 8 Subtract 3 on both sides so you get x by itself x+3 = 8 -3 -3 x=8-3 x=5 You're right =D
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Quella
ok this is straightforward. you basically locate the version of the two numbers. So the version between 50 and 40 5 is 5. after which you're making a fraction that's the version of the numbers over the unique quantity. So the fraction would be 5 over 50. once you simplify it, it equals a million over 10. So then you certainly would desire to locate the % of that. that's 10%
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Meed
this is stupid i'm in geometry honors and still can't answer this.... sorry): i think i need to retake pre algebra haha. i'm pretty sure though in your equation x would equal five, because with a three the two negatives combine to make a positive, so it would be 5 plus 3 equals 8. let me know if thats right?
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