Here is what happened. So I took this quiz, and bombed it. It really sucked. So I started to look over the questions, and it said this one is wrong (I chose C.)
Which of these is a simplified form of the equation 7x + 4 = 5 + 3x + 1x?

A. 3x = 9

B. 3x = 1

C. 11x = 9

D. 11x = 1

But the only problem is that I've got confirmation that C is in fact the right answer. So my question is, was I wrong?

Question

Here is what happened. So I took this quiz, and bombed it. It really sucked. So I started to look over the questions, and it said this one is wrong (I chose C.)
Which of these is a simplified form of the equation 7x + 4 = 5 + 3x + 1x?

A. 3x = 9

B. 3x = 1

C. 11x = 9

D. 11x = 1

But the only problem is that I've got confirmation that C is in fact the right answer. So my question is, was I wrong?

missmeow · Answer

And if I was, how can I solve this equation?

texaschic101 · Answer

7x + 4 = 5 + 3x + 1x
7x + 4 = 5 + 4x
7x - 4x = 5 - 4
3x = 1

missmeow · Answer

In this part, 7x - 4x = 5 - 4, how did the plus sign become a minus sign?

texaschic101 · Answer

first, i subtracted 4x from both sides, and then i subtracted 4 from both sides ? do u understand ?

missmeow · Answer

Yes, thank you!

texaschic101 · Answer

yw