Question

45-80-(20-x)=-45

Answer 1

45 - 80 -\((\)20-x\()\)= -45

45 - 80 -20 + x = -45

x = -45 -45 + 80 +20

x =10

vậy x = 10

Answer 2

-35 - (20 - x) = - 45

20 - x = - 35 - (-45)

20 - x = 10

x = 20 - 10

x = 10

Vậy x= 10

Answer 3

45-80-(20-x)=-45

80-(20-x)=45--45

80-(20-x)=0

20-x=80-0=80

x=20-80

x=-60

Answer 4

45 - 80 - (20 - x) = -45

80 - (20 - x) = 45 - (-45)

80 - (20 - x) = 45 + 45

80 - (20 - x) = 90

20 - x = 90 - 80

20 - x = 10

x = 20 - 10

x = 10

#Học tốt!!!

~NTTH~