
Mark M. answered 08/19/19
Mathematics Teacher - NCLB Highly Qualified
From what I read:
9(85 - n) = 7(4 + y)
Emily G.
asked 08/19/19Mark M. answered 08/19/19
Mathematics Teacher - NCLB Highly Qualified
From what I read:
9(85 - n) = 7(4 + y)
Peter C. answered 08/20/19
Experienced Math Tutor Specializing in Subjects
"How do you how do you write nine times a number wise subtract from 85 is seven times the sum of four and y"
I'm interpreting this as....
How do you write nine times a number subtracted from 85, is seven times the sum of four and y?
Let's go through each individual piece of information, starting with "nine times a number". We will let our unknown number be represented by x.
nine times a number = 9x
When something is "subtracted from 85", that means you're starting with 85 and subtracting something.
nine times a number subtracted from 85 = 85 - 9x
For "seven times the sum of four and y", start with the sum of 4 and y. A sum is an expression of addition, so we're adding 4 and y. We'll put that in parentheses and then multiply it with seven.
seven times the sum of four and y = 7 × (4+y)
Back to the original problem, "nine times a number subtracted from 85, is seven times the sum of four and y". Let's fill in everything in order, and replace "is" with an equal sign.
85 - 9x = 7 × (4+y)
So really, we're just translating from words to math symbols. Nine times "a number" could be 9a as well....or 9q, 9σ.....whatever you choose the symbol to be for the unknown number.
I hope this helps!
William B. answered 08/20/19
For Math, Physics, and anything else with equations...
Remember that:
So, if n is "a number" then:
"Nine times a number subtracted from 85 is seven times the sum of four and y" becomes...
"9 times n subtracted from 85 is 7 times the sum of 4 and y" becomes...
"9n subtracted from 85 = 7(sum of 4 and y)" becomes...
"85 minus 9n = 7(4+y)" becomes...
85 - 9n = 7(4+y)
So the answer is 85-9n=7(4+y). Tada!
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