Wrote and solve an equation to find the number.The difference of twice a number and 7 is 9
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Answer:
See below.
Step-by-step explanation:
So we started off with the equation:
And we subtracted x from both sides to acquire:
Now, this is essentially slope-intercept form. Recall that the slope-intercept form is:
Where m is the slope and b is the y-intercept.
If we rearrange our equation:
And put some parentheses:
We can see that this is indeed slope-intercept form.
And we can see that m is -1 and b is 2.
In other words, the slope is -1 and the y-intercept is 2.
Multiply both sides by 2.54.
Multiply both sides by x.
x = 60.96
Hence, Aaron needs 60.96 centimeters of wire.