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zvonat [6]
3 years ago
8

When ms. shreve solved an equation in class, she checked her solution and found that it did not make the equation true! Examine

her work below and find her mistake. Then find the correct solution.
5(2×-1)-3×=5×+9
10×-5-3×=5×+9
7×-5=5××9
12×=4
×=1/3
Mathematics
1 answer:
IgorC [24]3 years ago
7 0
The first part of the second line, she left the -5 there. The correct work and solution should be this:
5(2x-1)-3x=5x+9
<span><span>7x</span>−5</span>=<span><span>5x</span>+<span>9
</span></span>2x-5=9
2x=14
x=7
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When 5 times a number is added to 45 the answer is the sm of 85 and 140 what is the number
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Hello.

First, let the number be r.

5 times r is written like this:

\rm{5r}

Now, add 45:

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Now, the sum of 5r+45 is equal to the sum of 85 and 140:

\mathrm{5r+45=85+140}

In order to solve this equation, we need to add 85 and 140:

\mathrm{5r+45=225}

Now, subtract 45 from both sides:

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\mathrm{5r=225-45}

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The last step is to divide both sides by 5:

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Therefore, the answer is

\rm{r=36}

I hope it helps.

Have a nice day.

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