18. Tìm x biết:
a) 15 – ( 4 – x) = 6 ; b) - 30 + ( 25 – x) = - 1 ;
c) x – ( 12 – 25) = -8 ; d) ( x – 29 ) – ( 17 – 38 ) = - 9
e) x – 5 = - 1 ; g) x + 30 = - 4;
h) x – ( - 24) = 3 ; i) 22 – ( - x ) = 12;
Loga
Sinh Học lớp 12
