`a, -> x + 15 = 26`
`-> x = 11`
`b, 24 - x = 6`
`-> x = 18`
`c, 2x - 14 = -50`
`2x = -36`
`-> x = -18`
`d, 9 - 3x = 48`
`-> 3x = -39`
`-> x = -13`
a: =>x+15=26
hay x=11
b: =>24-x=-5+11=6
=>x=18
c: =>2x-14=-50
=>2x=-36
hay x=-18
a) 47 - ( x + 15 ) = 21
x + 15 = 47 - 21
x + 15 = 26
x = 26 - 15
x = 11
Vậy x = 11
b) -5 - ( 24 - x ) = -11
24 - x = ( -5 ) - ( -11 )
24 - x = 6
x = 24 - 6
x = 18
Vậy x = 18
`a) 62-x=21`
`=> x=41`
`b) -5-(24-x)=-11`
`=> x-28=-11`
`=> x=17`
`c) 114-2x=150`
`=> 2x=-36`
`=> x=-18`
`d) 45+3x=102`
`=>3x=57`
`=> x=19`
c) 100 - ( 2x - 14 ) = 150
2x - 14 = 100 - 150
2x - 14 = ( -50 )
2x = (- 50 ) + 14
2x = -36
=> x =( -18 )
Vậy x = ( - 18 )
d) 54 - ( 9 - 3x ) = 102
9 - 3x = 54 - 102
9 - 3x = ( -48 )
3x = 9 - ( -48 )
3x = 57
=> x =19
Vậy x = 19
\(a.47-\left(x+15\right)=21.\)
\(-\left(x+15\right)=21-47\)
\(-\left(x+15\right)=-26\)
\(x+15=26\)
\(x=26-15\)
\(x=11.\)
\(Vậy...\)
\(b.-5-\left(24-x\right)=-11.\)
\(-\left(24-x\right)=-11+5\)
\(-\left(24-x\right)=-6\)
\(24-x=6\)
\(-x=6-24\)
\(-x=-18\)
\(x=18.\)
\(Vậy...\)
\(c.100-\left(2x-14\right)=150.\)
\(-\left(2x-14\right)=150-100\)
\(-\left(2x-14\right)=50\)
\(2x-14=-50\)
\(2x=-50+14\)
\(2x=-36\)
\(x=-36:2\)
\(x=-18.\)
\(Vậy...\)
\(d.54-\left(9-3x\right)=102.\)
\(-\left(9-3x\right)=102-54\)
\(-\left(9-3x\right)=48\)
\(9-3x=-48\)
\(-3x=-48-9\)
\(-3x=-57\)
\(x=-57:\left(-3\right)\)
\(x=19.\)
\(Vậy...\)
A) 47-(X+15)=21
x+15=47-21=26
x=26-15
x= 11
b) (-5)-(24-x)=-11
24-x=-5+-11=6
x=24-6
x=18
c) 100-(2x-14)=150
2x-14=100-150=-50
2x=-50+14=-36
x=-36:2
x=-18
d) 54-(9-3x)=102
9-3x=54-102=-48
3x=9-(-48)=57
x=57:3
x=19
