Answer:
Explanation:
We are given an equation( a math expression with an equal sign)
5+x-12=x-7
First things first, we need to combine any like terms(add/subtract) on the same side
A term is a number, variable, that is separated by a plus symbol or minus symbol.
Here 5 and -12 are similar terms so let combine them
5-12=-7 So the equation become
x-7=x-7
Step 2: Notice how the left hand and right-hand side are the same thus we do not need to solve this equation. But let do the work instead
x-7=x-7
x=x
Thus, the solution is All Real Numbers
Part B:
Substitute -4 for x in the original equation.
5+(-4)-12=-4-7
1-12=-4-7
-11=-11
Thus, the equation is true here.
Substitute 0 for x in the original equation
5+0-12=0-7
-7=-7
Equation is True Here
Try 5 for x as well
5+5-12=5-7
10-12=5-7
-2=-2
So equation is true as well.
Let me know if you have any questions or concerns.