This equation does not have a solution. You can see this through the work below.
4m-4=4m
-4m -4m
-4≠0
There is no solution because 0 does not equal -4.
To solve, you need to plug in the values they give you into the equation.
5t + 2m
Plug in the numbers they give you
5(2) + 2(7)
Solve.
10 + 14
Simplify.
24
Ok, C is 16 feet below the sea level = -16
D is below the sea level is 1/2 of the elevation of city it's mean
-16 divided 1/2 = -8
Solve: -8 multiply 2 is -16