câu 1 :a, (-19 +19) + (84+16 ) = 100
b, (2^3 x 125 ) x (-7)= 1000x (-7) = -7000
c, 437-25-175-437 =(437-437 )-(25 -125 )= 100
d, 17 x (-39 + (-161 )) = 17x (-200) =-3400
Câu 2 :
a, X = -23 +33 +10 b, X = (25-37) : 3 = -4 c, ( 4x +15 )^3 = 3^3
=> 4x +15 = 3
4x = -12
x = -3