Tìm số nguyên x, biết: a) x–32=(−5)−17 b) 16–x=21–(−8) c) 106−x=(−58)–8

* Hướng dẫn giải

a) $x–32=\left(-5\right)-17\iff x–32=-32$$\iff x=-32+32\iff x=0.$

b) $16–x=21–\left(-8\right)\iff 16–x=21+8$$\iff 16-x=30\iff -x=30-16$$\iff -x=14\iff x=-14.$

c) $106-x=\left(-58\right)–8\iff 106-x=-66$$\iff -x=-66-106\iff -x=-172$$\iff x=172.$