M+(-9.5)=-7.8 how do you do this problem

M + (-9.5) = -7.8

First, simplify your brackets. / Your problem should look like: 
Second, change addition to subtraction. / Your problem should look like: 
Third, add 9.5 to both sides. / Your problem should look like: 
Fourth, simplify. / Your problem should look like: 

 m = 1.7

The solution of the system of linear equations is b. (2,-3) because the solution is the poi (point of intersection)