Seven times a number, added to 3, is 45. find the number.

6

Step-by-step explanation:

The setup looks like this

X=the number

7X

Subrtact the 3 from 45

Now we need to get rid of the 7 on the left, so in order to do that, we divide seven from both sides

Now we have our answer

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )