May anyone me on this using simplest form

Well first you have to find the least common denominator
for each, then subtract
7. will be 
5/12
4.will be
3/10
10.will be
5/10

when you put the problem in simplest form you will have to rewrite it down

Where m is the slope of the line and b is the y-intercept of the line, or the y-coordinate of the point at which the line crosses the y-axis. to write an equation in slope-intercept form, given a graph of that equation, pick two points on the line and use them to find the slope. this is the value of m in the equation.