a, 190 - 2(2x-6) = 182
=> 2 ( 2x - 6 ) = 8
=> 2x - 6 = 4
=> 2x = 10
=> x = 5
b, 1300 : [ 120 - ( x - 9 ) ] = 25
=> [ 120 -( x - 9 ) ] = 52
=> x - 9 = 68
=> x = 77
c, 1793 ( x : 1792 ) = 0
=> x : 1972 = 0
=> x = 0
a)
190-2(2x-6)=182
2(2x-6)=190-182
2(2x-6)=8
2x-6=8:2
2x-6=4
2x=4-6
2x=-2
x=-2:2
x=-1
\(190-2\left(2x-6\right)=182\)
\(2\left(2x-6\right)=190-182=8\)
\(2x-6=8:2=4\)
\(2x=6-4=2\)
\(\Rightarrow x=2:2=1\)
Vậy \(x=1\)
a, 190 - 2 (2x-6) = 182
2 ( 2x-6) = 190-182
2(2x-6) = 8
2x-6 = 8:2
2x-6 = 4
2x = 4+6
2x =10
x= 10:2
x= 5
b, 1300: [ 120 - (x-9) ] = 25
120 - (x-9 ) = 1300 : 25
120- ( x-9 ) = 52
x-9 = 120- 52
x-9 = 68
x = 68+9
x= 77