(128 + 49) - x = 28 x - (133 + 75) = 32 (163 - x) - 117 = 0 145 - (x + 45) = 50 (39 + x) - 27 = 22 44 - (22 + x) = 22 78 - 16 - x = 41
X=128-28+49=149 x=133+32+75=165+75=240 x=163-117=46 x=145-45-50=50 x=22+27-39=10 x=22-22=0 x=78-16-41=21