2m - m - 7m simplified is

-6m

Step-by-step explanation:

You can change the "m" in the equation to 1m so if I re-write the problem with this new information it is as follows, 2m-1m-7m So first we take a look at the first portion of the equation and that is, 2m-1m. Which is pretty much a no-brainer, we get 1m or just m. Then we take a look at the second portion of the equation which again, is as follows, 1m(or m)-7m. 1-7=-6 so if the answer with no variable is -6 then just add your variable on the end and get a final answer of...-6M

I hope this answer was not confusing and could help you out a bit. If you would be so kind, please mark this answer brainliest.  

no solution

step-by-step explanation:

there is not enough information in the problem to solve.

starting with:    

5 + x - 12 = 2x - 7   

5 + x - 12 - x = 2x - 7 - x (subtract x from both sides)   

5 - 12 = x - 7 (combine and cancel x's from both sides)   

5 - 12 + 7 = x - 7 + 7 (add 7 to both sides)   

0 = x (add numbers together on both sides)       

so in order for the equation to be true, x must be 0.   

trying x = -0.5   

5 + x - 12 = 2x - 7 (original equation)   

5 + -0.5 - 12 = 2(-0.5) - 7 (plug in value of x)   

5 + -0.5 - 12 = -1 - 7 (did multiplication)   

-7.5 = -8 (did addition on both sides)       

since -7.5 is obviously not equal to -8, the value of -0.5 for x is wrong.   

trying x = 0   

5 + x - 12 = 2x - 7 (original equation)   

5 + 0 - 12 = 2(0) - 7 (plug in value of x)   

5 + 0 - 12 = 0 - 7 (did multiplication)   

-7 = -7 (did addition on both sides)       

since -7 equals -7, that demonstrates that the value of 0 for x is correct.   

trying x = 1   

5 + x - 12 = 2x - 7 (original equation)   

5 + 1 - 12 = 2(1) - 7 (plug in value of x)   

5 + 1 - 12 = 2 - 7 (did multiplication)   

-6 = -5 (did addition on both sides)       

since -6 is obviously not equal to -5, the value of 1 for x is wrong.