Question

14a +28c=7 solve for c

Answer 1

14a+28c=7 => 7(2a+4c)=7 => 2a+4c=1 => 2(a+2c)=1 =>a+2c=1/2 => 2c=1/2-a => c=(1/2-a):2

Answer 2

`14a + 28c = 7 \\ \\ 14(a + 2c) = 7 \\ \\ a + 2x = (7)/(14) \\ \\ a + 2c = (1)/(2) \\ \\ 2c = (1)/(2) - a \\ \\ c = ( (1)/(2) -a)/(2) \\ \\ c = ( (1)/(2) )/(2) - (a)/(2) \\ \\ c = (1)/(2 * 2) - (a)/(2) \\ \\ c = (1)/(4) - (a)/(2) \\ \\ Answer: \fbox {c = 1/4 - a/2}`