Solve. -7x+1+8x=x+1 How do I get this answer!?

Question

My multiple answers are A.) Indentity B.) No Solution C.) 1 D.) 0

Answer 1

isolate the variable

-7x+1+8x=x+1
-7x+8x=x
x=x
x=1

the answer is c) 1
now give me 10 points please!!!

Answer 2

This is sooooooo easy. I mean, I could have done it if I was in grade 4.

Put all the x on the left of the equal sign and put all the numbers on the right. When values and variables go from one side to the other, they change their sign.

-7x+1+8x=x+1
-7x+8x-x=1-1
0x=0
x=0/0
since 0 divided by a number is always a number, while anything divided by zero is infinite, x can be anything.

So the answer is B) No Solution

Edit: Wait, I change my mind! It's Identity, but you spelled it wrong, so I was like, indentity???

Answer 3

A. is correct. These are ALWAYS solved by "collecting" the terms of each type. Hence:

-7x+1+8x=x+1 when you collect the x terms becomes
-7x+8x + 1 = x + 1 or
x+1=x+1, which is true for any (constant) value of x, an identity

Answer 4

There is no answer to your question because if you combine the x's together you have zero x's also if you subtract 1 from both sides of the equation, you have zero left. Your equation reduces to 0=0, which tells you nothing about x. You could substitute 100 for x and you would get -700+1+800=100+1 or 101=101 which gives no information at all.

Answer 5

Identity? Is that a number?

The answer is that there are infinite solutions. Here's how it works:

First, add all like terms:

-7x+1+8x = x+1
x+1 = x+1

Since x+1 = x+1, that means x = x. So there is no fixed value for x.

So my answer is A, because it can't be anything else.

Answer 6

-7x+1+8x=x+1
so you combine the 2 sets of 'x's on the left side
-7x+8x is 1x; or X

so now we have
x+1=x+1

subtract 1 from both sides and you get
x=x

so you get identity. I'm pretty sure that A is the right answer

Answer 7

Okay, so you have -7x + 1 +8x = x + 1
On the left of the equation you can gather all the x's together so -7x+8x = 1x
so your left with x+1=x+1 which is x=x
So i think thats a identity.

Answer 8

First, take all the X's to one side of the equation, and all non-X's to the other side:
-7x+8x-x=0
-8x + 8x =0
so the answer is
0x=0
therefore the answer is zero
(remember that sign changes when you move from one side of equation to the other)
wait to see whos right before giving best answer :)

Answer 9

I did school maths a long time ago. In my day, we did things the simple way, and really got to see why maths worked. I mean; we used matches at first, to learn arithmetic, and worked up to complex things. Maybe your teachers tried to skip the basics?

Try it:


rewrite it, spreading out the items so your eyes can group them well:

(-7x) + (1) + (8x) = x + 1

when you break up 8x into 7x plus x, it will seem so simple to you too. After all,

7x plus x = 8x :-)

So, write it as:

(-7x) + (1) + (7x plus x) = x + 1

then as:

(-7x) + (1) + (7x) + (x) = x + 1

The terms -7x and + 7x cancel each other out, so it becomes:

(1) + ( x) = x + 1

OK?

IIRC, this uses the "law of distribution".

Answer 10

Transpose the x from the right side of the equal sign, and you have
-X + 8X+1 -7X, adding -7x and -1x, you get -8X +8x +1, doing simple arithematic, you get 1=1 (Ans.)

Answer 11

-7x+1+8x=x+1
-7x+8x-x=1-1
0 ??!