Question

Where did I go wrong?

Answer 1

Solve the equation.
3x+9- [7x-{11(x-1)-5}] = 4 (x-4)
3x+9- [7x-{11x-11-5}] = 4x-16
3x+9-[7x-{11x-16}] =4x-16
3x+9- [7x{-11+16}] =4x -16
3x+9-[-77x +112] = 4x-16
3x+9 +77x-112= 4x-16
80x-103=4x-16
76x-103=-16
76x=87

Answer 2

third step:

3x+9-[7x-{11x-16}] =4x-16
3x+9- [7x{-11+16}] =4x -16

you can't multiply 7x and 11x, since there's a subtraction sign between them

Answer 3

I distributed the negative sign first

Answer 4

yes, you are supposed to distribute the negative sign, but you still can't multiply 7x and 11x

the correct way to proceed:

3x+9-[7x-{11x-16}] =4x-16

distributing the negative sign gives us:

3x+9- [7x-11x+16] =4x -16

then we combine like terms within the bracket

3x+9- [-4x+16] =4x -16

and then we keep going...

Answer 5

is that clear?

Answer 6

Yes one sec

Answer 7

x=-3

Answer 8

yup ~ good job

Answer 9

Thank you.