Represent 'a number' by x
7 times x equals 9 more than 4 times x
7 times x=9+4 times x
7x=9+4x
subtract 4x from both sides
3x=9
divide 3
x=3
the number is 3
The second step is wrong. What should've been done is to find greatest common factor (gcf) of 1/6 and -2. This is because you cannont add together a number with a variable to a number without a variable. So get the variable by itself by subtracting 1/6 from both sides.
1/5x + 1/6 = -2
___— 1/6_— 1/6
____________
Turn -2 into a fraction and find the gcf of -2 and 6:
1/5x + 1/6 = -2
___— 1/6_— 1/6
____________
1/5x = -2/1 — 1/6 ——> 1/5x = -12/6 — 1/6
1/5x = -13/6
Then divide each side by 1/5 to get the variable by itself; remeber: when dividing a fraction by a fraction, you multiply by the reciprocal.
5/1 • 1/5x = -13/6 • 5/1
x = 65/6
Then, simplify
65/6} 10.83 or 10 83/100
Answer:
8/3 as a mixed number would be written as 2 2/3.
Based on the heights of the people, the person who is the tallest amongst them is the height of 35 5 / 6.
<h3>How to find the tallest?</h3>
To find the tallest person, convert all the given heights to decimals to make comparison easier.
When converted, the heights are:
= 35 + 5/6
= 35 + 0.83
= 35.83
= 35 + 3/8
= 35 + 0.375
= 35.375
= 35 + 1/4
= 35 + 0.25
= 35.25
35.1
35.7
Going by the decimals, the person with the greatest height and so is the tallest is 35 5 / 6.
Find out more on the tallest person at brainly.com/question/24669080
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Answer:
6y(y^2-3x)
Step-by-step explanation:
6y^3-18xy=6y(y^2-3x)
