Tính1/ - (5+x-3) -|-4|=5-(7+4) 2/ x-(5-|-7|)+3)=|-8|+6-2 3/ 4- (12-17)=17-(x-4+15) 4/ |5-(-2) + (-8)|=9-2+x 5/ 15-(x+15)=|-5+6-8| 6/ 17-(20-|-25|+x)= - (-7) 7/ 14- (12-x)= -(15-13) 8/ 13 - (23-17) = 15 - (23-x) 9/ 21 - (25-x+21)= - (25 - 7) 10/ 12+(23 - x )= 32-(5 - 12) |