There is only one solution which is x = -370 to the given equation 0.75(x + 40) = 0.35(x + 20) + 0.35(x + 20) option second is correct.

<h3>What is linear equation?</h3>

It is defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.

If in the linear equation, one variable is present, then the equation is known as the linear equation in one variable.

We have a linear equation in one variable:

0.75(x + 40) = 0.35(x + 20) + 0.35(x + 20)

After rearranging and simplification:

$\rm 0.75\left(x+40\right)=0.7\left(x+20\right)$

$\rm 75\left(x+40\right)=70\left(x+20\right)$

$\rm 75x+3000-3000=70x+1400-3000$

$\rm 75x=70x-1600$

x = -370

Thus, there is only one solution which is x = -370 to the given equation 0.75(x + 40) = 0.35(x + 20) + 0.35(x + 20) option second is correct.

Learn more about the linear equation here:

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8 0

2 years ago

Ty is placing CDs in boxes. There are a total of 7,200 CDs. Each box holds 90 CDs. How many boxes will Ty fill? A. 80 B. 70 C. 1

Dennis_Churaev [7]

Answer:

<em>80 boxes.</em>

Step-by-step explanation:

Total CDs available = 7200CDs

Amount of CD in each box = 90 CDs

To get the number of boxed Ty will fill, we will say;

90CDs = 1box

7200 CDs = x

Cross multiply

90 * x = 7200 * 1

90x = 7200

x = 7200/90

<em>Hence Ty will fill total of 80 boxes.</em>

7 0

3 years ago