Pls help with this word problem !!

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)