(X-348)+159=601 468-(259-x)=382' (x-12)*8=56 9y-54=162 (y+25):8=16 38x+15=91 123-4x=749

х - 348 + 159 = 601 х = 601 - 159 + 348 х = 790 ------------------- 468 - (259 + х )= 382 (259 +х) = 468 - 382 259 + х = 86 х = 86 - 259 х = - 173 --------------------------- 8х - 96 = 56 8х = 56 + 92 8х = 152   х = 19 -------------------------- 9у - 54 = 162 9у = 162 + 54 9у = 216 у = 24 ----------------------- (у + 25) = 16 * 8 у + 25 = 128 у = 128 - 25 у = 103 ---------------------------- 38х = 91 - 15 38х = 76     х = 2 ------------------------------ 4х = 123 - 749 4х = - 626   х = - 156,5