I am guessing a more complete representation of this equation would look like this: 3(A+2)=2(A-7)?
If so, the way to solve it would involve expanding the terms on either side of the equation, and then isolating the variable. To do this (we'll start with 3(A+2)), you multiply the number...

With linear equations (in this case, inequality), you must have two equations to find the ordered pair that defines the points where the two equations intersect. For example: if you have y=-2x+10 and y=3x-5, you would be able to determine the value of x by substituting the y in one equation...

When graphing linear equations, the easiest way is to put it into slope-intercept form: y=mx+b (m being the slope, and b being the y-intercept).
So, to put the first equation into slope-intercept form, we subtract the 5x from both sides of the equation, resulting in 6y = -5x + 225. Then...