I need math help please ?

Question

Be sure to distribute and collect like terms before you solve.

2(2x - 4) + 3x = -1

x = __________

Watch those signs. You should add a 3 to both sides of the equation and then divide by 5.

-3 + 5x = 12

x = __________

-3x = 15

x = 5

Is the equation above solved correctly?

5x - 7 = 108

-5x = 115

x = 23

Is x = 23 the correct solution to this equation?

Yes

No

Answer 1

x=1

x=3

no...the answer should be -5

yes....but I don't know where they got the -5x in the second part of the equation.

Hope this helps and if you need explaining just e-mail me.  

Answer 2

1) distribute 2 to (2x-4)

>>4x-8+3x = -1

2) combine like terms

>>7x-8 = -1

3) add 8 to both sides

>>7x = 7

4) divide 7 to both sides

>> x = 1 <<

======================================...

1) add 3 to both sides

>>5x = 15

2) divide 5 to both sides

>> x = 3 <<

======================================...

1) divide -3 to both sides

>> x = -5 <<

>>>no, the problem's not solved correctly

======================================...

1) add 7 to both sides

>>5x = 115

2) divide 5 from both sides

>> x = 23 <<

***error is in 2nd line. where did the -5 come from? it's just 5x=115***

>>> yes, this solution is correct. however, how it is worked out is not...

Answer 3

4x - 8 + 3x = -1

7x - 8 = -1

7x = 7

x = 1

5x = 15

x = 3

No, x = -5

Yes, x = 23.

Answer 4

ur question is not clear.

Answer 5

x = 1

x = 3

No

No

Answer 6

2(2x - 4) + 3x = -1

Distribute the 2....

4x - 8 + 3x = -1

Combine like terms...

7x - 8 = -1

Add 8 to each side...

7x = 7

DIvide each side by 7

x = 1

--------------------------------------...

-3 + 5x = 12

Add 3 to each side

5x = 15

Divide each side by 5

x = 3

-------------------------------------

-3x = 15

Divide each side by -3

x = -5  The equation was not solved correctly

----------------------------------

5x - 7 = 108

Add 7 to each side

5x = 115

Divide each side by 5

x = 23  The answer is correct, even though there is a typo in the proposed solution.