Make y the subject of 4y-2x=17 and 2y over 3-x=z (by over i mean that 2y is above 3 and 3 is under the line if you know what it mean!) please help and show working out! thank you!! 11/28/2013 | Kath from Mount Marion, NY | 1 Answer | 0 Votes Mark favorite Subscribe Comment
Hi again Kath; 4y-2x=17 Let's add 2x to both sides... 2x+4y-2x=2x+17 4y=2x+17 Let's divide both sides by 4... y=(2x+17)/4 y=(2/4)x+(17/4) y=(1/2)x+(17/4) 2y over 3-x=z (2y)/(3-x)=z Let's multiply both sides by (3-x) (3-x)[(2y)/(3-x)]=z(3-x) 2y=z(3-x) Let's divide both sides by 2... (2y)/2=[z(3-x)]/2 y=[z(3-x)]/2 11/28/2013 | Vivian L. Best answer Comment