Please solve with work shown 3x-(x-5)=153

Mathematics

2 answers:

pishuonlain [190]4 years ago

6 0

Use cymath it gives you the math answers but the answer is x=74

____ [38]4 years ago

5 0

3x-1(x-5)=153
3x-x+5=153
2x-5=153
minus 5 to both sides
2x=148
divide b 2
x=74

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How to solve this problem?

valentinak56 [21]

Very nice handwriting but the math and English are confusing.

Let's assume we're told

$\displaystyle 45 = \sum_{i=1}^9 (x_i - 10)^2$

The subscript is important.

I think we're told the similar sum with 11 gives the smallest possible value for the sum. This is a rather cagey way of telling us 11 is the mean of the nine points. The mean is the number which minimizes the sum of squared deviations.

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