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Mathematics 13 Online
OpenStudy (chycora):

3. (1 pt) What is the solution to the equation? 4(3 + 7) = 4 • x + 4 • 7 A. x = 3 B. x = 4 C. x = 7 D. x = 10

OpenStudy (anonymous):

What do you think we do first?

OpenStudy (chycora):

4*3 +4*7

OpenStudy (anonymous):

Yes

OpenStudy (anonymous):

Now multiply them and add

OpenStudy (chycora):

15 +28

OpenStudy (anonymous):

Actually, 4 * 3 isn't 15.

OpenStudy (chycora):

srry 12

OpenStudy (anonymous):

Yes, now add 12 + 28.

OpenStudy (chycora):

i'm actin slow today lol

OpenStudy (chycora):

40

OpenStudy (anonymous):

Yep, so we have: 40 = 4x + 4 * 7 What's 4 * 7?

OpenStudy (chycora):

28

OpenStudy (anonymous):

Yes, so we have: 40 = 4x + 28 Now subtract 28 to both sides.

OpenStudy (anonymous):

40 - 28.

OpenStudy (chycora):

o ok i gt it kn thanx yall

OpenStudy (anonymous):

No problem.

OpenStudy (anonymous):

You do? Then what is your answer?

OpenStudy (anonymous):

@chycora

OpenStudy (chycora):

um 3x

OpenStudy (anonymous):

No..subtract 40 - 28

OpenStudy (anonymous):

Yes! The value of x is 3.

OpenStudy (anonymous):

Oh, I thought you meant the answer was '3x' but you meant 'x = 3' Yes, 3 is correct.

OpenStudy (anonymous):

Because when you subtract 40 - 28, you get 12, and the equation is 12 = 4x, and when you divide 12 \(\div\) 4, you get 3. :)

OpenStudy (chycora):

k yay

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