(6c/11) + (9/2) = 3
LCD = 22 = 2 * 11
[2(6c)]/ 22 + (9*11)/22 = (3* 22)/22
12c/22 + 99/22 = 66/22
12c/22 = -33/22 subtract 99/22 from both sides
12c = -33 multiply by 22 to get rid of the denominator
c = -33/12 divide by 12 on both sides
c = -2 9/12 = -2 3/4