Is this answer correct?

Question

Just a little algebra for everyone, is this correct? "x" is the algebra x

4(x + 9) -2 (x + 3) =15

is it -7.5?

thnx to all

Answer 1

Yes the answer -7.5 is correct.

Answer 2

yes it is correct.

Answer 3

4x+36-2x-6 = 15

2x +30 =15  

2x = 15-30

2x = -15

x = -15/2 = - 7.5  

Answer 4

yes you are absolutely correct

Answer 5

You can do a self-check simply by substituting back into the original equation:

4(-7.5+9) - 2(-7.5+3) = 6 - (-9) = 15, so correct.

Answer 6

Yup, you're right.

Answer 7

4x + 36 - 2x -6 = 15      <==(-2 multiplied by +3 = -6)

4x - 2x + 36 - 6 = 15    

4x - 2x = 15 + 6 -36     <==(joining variables on one side, and

                                         numbers on the other side.)

2x = -15                      <==(simplifying)

2x/2 = -15/2

x = -7.5

You're right.        

Answer 8

4(x + 9) - 2(x + 3) = 15

4x + 36 - 2x - 6 = 15

2x + 30 = 15

2x = 15 - 30

2x = -15

x = -15/2

x = -7.5

You are correct.

Answer 9

Yes, great job!