(-9)-11w=42 -4w+7w = +3w. You don't change the sign of the 7w unless you move it to the other side.
The answer is, indeed, 17.
I got -17. How is this possible?
Re-read my first response.
-4w+7w= +3w and not -3w.
I know that it was positive. I wrote a minus sign, not a negative sign. What do I have to do.
P.S- Sorry, but I really want to get it right.
No, you wrote a -3w where I have placed the asterisks. You made another error also, You placed a - sign in front of a -4. You should not have done that.I have placed a # mark there.
3w/3 = 51/3
Oh, okay I understand now.
Thank you. I did the correct work.
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