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3 years ago

If eight times a number is subtracted from eleventimes the number,the result is -9.find the number.

Mathematics

2 answers:

Talja [164]3 years ago

6 0

The answer is n=3 when n= a number

CaHeK987 [17]3 years ago

4 0

So this question can be representd by

eight times a number, (8x), is subtracted from (-8x) eleven times a number (11x), the result is -9

so -8x+11x=-9 or
11x-8x=-9
add like terms
3x=-9
divide both sides by 3
x=-3

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What are the steps to solve for: 1/5(x+5)=1/4(x-3)+1

andrew11 [14]

Step 1. Simplify $\frac{1}{5} (x+5)$ to $\frac{x+5}{5}$

$\frac{x+5}{5} = \frac{1}{4} (x-3)+1$

Step 2. Simplify $\frac{x+5}{5}$ to $1+ \frac{x}{5}$

$1+ \frac{x}{5} = \frac{1}{4} (x-3)+1$

Step 3. Simplify $\frac{1}{4} (x-3)$ to $\frac{x-3}{4}$

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Step 4. Cancel $1$ on both sides

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Step 5. Multiply both sides by $20$ (the LCM of $5,4$ )

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Step 6. Expand

$4x=5x-15$

Step 7. Subtract $5x$ from both sides

$4x-5x=-15$

Step 8. Simplify $4x-5x$ to $-x$

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Step 9. Multiply both sides by $-1$

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Done! :) Hope this helps! :)

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3 years ago