I have this question that says..Define a variable, write an inequality, and solve. The sum of a number and three is less than nineteen less the number?
the equation would be n+3<n-19 . a variable is an unknown value in an expression or an equation. i'm not sure exactly how to solve it without writing anumber line, sorry.
Comments
Let's call your variable 'x'.
The inequality would be:
x+3<x-19
Now, you want to group all of the like terms. Let's begin with the normal digits.
x+3<x-19
Subtract three from each side (so that you can undo the three on the left side).
You're left with 'x<x-22'.
Now, you want to combine the two x's. So, subtract x from each side (undo the x on the right).
You're left with 0x<-22.
Divide each side by 0, and you know that
X=undefined
x + 3 < x-19 This is the inequality.
3< -19 This is derived from the above equation. because 3 is not less than -19, This inequality is not true, so there is no answer for it (undefined).
the variable is x (defined as the unknown)
Are u sure you copied the question right?
the equation would be n+3<n-19 . a variable is an unknown value in an expression or an equation. i'm not sure exactly how to solve it without writing anumber line, sorry.
No, these people got it backwards I think...
it would be x + 3 < 19 - x
that way it would be solved as follows:
x + 3 < 19 - x
2x < 16
x < 8
and if you plug it back in, it works
Hopefully that helps
I agree with Laura, everyone else is reading the problem backwards
first - variable=x (or whatever letter you want, I don't care)
x+3 < x-19
x < x-22
0 < -22
the variable is undefined
i think you copied down the variable wrong because there is no division by 0 so that makes x undefined.
Guess and check all the way. yeah I know it sucks, but start low, and look for a pattern so you can find the numbers faster