Question

Can someone please explain to me how to find the value of m? thanks-10 = -10 + 7m

Answer 1

                                        -10  =  -10  +  7m

Add  10  to each side:      0  =          7m

Divide each side by  7 :    0  =          m


Please take a second and just LOOK at the equation you started with.
It says: 

--  You have this number '-10' . 

--  Your number  -10  is going to be exactly the same size
     after you add 7 of something to it.

The ONLY way that could happen is if the 'something' is 'nothing' .

       ' m '  must be nothing.

Answer 2

To find the value of m you need to change the equation so it is x=m. First, we do inverse operations. Since multiplication came first, we do it last. So, -10 becomes +10. You add 10 to both sides. You get 0=7m because -10 cancels itself out. Then you divide by 7 on both sides. You get 0=m. You get this because 0 divided by 7 is 0. To check your work insert 0 into m's place. -10= -10 + 7(0). You get -10=-10. Now you know that m does indeed equal 0.