Answer:
.25
1/4
are the numbers equivalent to 25%
75m + 800 = 95m + 500
Solve that equation
Which should get you m=15
15 is your answer
1/3(6x-12y)
2x - 4y
the answer is A
Y=mx+c isn't an equation to solve. It's the slope-intercept formula for graphing lines.
y and x are the variables, and m and c are the constants.
As an example, the line y=4x+2 looks like this: