# 2 equations, 2 unknowns

 P: 560 These are not equations, there are no equal signs. Thus they cannot be solved. But, if they were to have equal signs, sin (53.1301) just represents a number right? If you 53.1301 is in degrees and not radians (very likely) then sin (53.1301)= $$0.8$$ To solve two equations in two unkowns, there are a few ways. Perhaps the easiest is to solve for one variable in one of the equations in terms of the other equation and then plug that into the other equation. So lets say you have two equations in y and x such as: 3x+y=5 y+5x=2 You could solve the second one for y.. y=2-5x right? now plugging it into the first one you get 3x+2-5x=5 -2x=3 x=-2/3 Now just plug x=-2/3 into the other equation and solve for y. Easy.