9a+3a+8b+4b=12a+12b=12 (a+b)=12 * 6 =72
14c+5d+13c+22d = 27c+27d=27(c+d)=22 * 4=88
7x+8y+11y+12x=19x+19y=19(x+y)=19 * 3 = 57
9a+3a+8b+4b=12a+12b=12 (a+b)=12 * 6 =72
14c+5d+13c+22d = 27c+27d=27(c+d)=22 * 4=88
7x+8y+11y+12x=19x+19y=19(x+y)=19 * 3 = 57