d)  80 - 130 - 12 - 4 2 = 80 - [130-82] = 80 - [130-64] = 80-66 = 14

96 - 3 ( x + 1 ) = 42

=>3(x+1)=54

=>x+1=18

=>x=17

80 - { 130 - (12 -4 )}

=80-{130-8}

=80-122

=-42

=80-(130-64)

=80-66

=14

14

=80-(130-64)

=80-66

=14

a) 80 - [130 - (12 -4)² ] 

= 80 - ( 130 - 8² )

= 80 - 116

= -36

b) 541 + (218 - b) = 735

218 - b = 194

b = 24

c) 5(x + 35) =515

x+35 = 103

x = 68

d) 96 - 3(x + 1) = 42

3(x+1) = 54

x+1 = 18

x = 17

12x - 33 = 3² . 3³

12x - 33 = 243

12x = 276

x = 23

\(\text{80 + ( 130 - ( 12- 5)}=80+130-\left(12-5\right)=210-7=203\)

Ủng hộ mik nhé!!

80 + ( 130 - ( 12 - 5 ) ) 

= 80 + ( 130 - 7 ) 

= 80 + 123 

= 203

bn làm khó hiểu quá

lỗi mẫu=>mũ nhé

=14

\(80-\left[130-\dfrac{\left(12-4\right)}{2}\right]=80-\left(130-4\right)\)

\(=80-126-46\)

80-[130-(12-4)^2]

= 80-[130-(8)^2]

=80-[130-64]

=80-66

=14

👌👌👌

80 - [ 130 - 8^{2  ]}

= 80 - 130 - 64

= -114

\(80-\left[130-\left(12-4\right)^2\right]\)

\(=80-\left[130-8^2\right]\)

\(=80-\left[130-64\right]\)

\(=80-66=14\)

14

80 - [ 130 - ( 12 -  4 ) ^ 2 

= 80 - [ 130 - 8^2 ]

= 80 - [ 130 - 64 ]

= 80 - 66 = 14

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14 ban nhe