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a) 124 + (118 - x) = 217
242 - x = 217
x = 242 - 217
x = 25
a) \(124+\left(118+x\right)=217\)
\(118+x=217-124\)
\(118+x=93\)
\(x=-25\)
vay \(x=-25\)
b) \(\left[\left(6x-72\right):2-84\right].28=5628\)
\(\left(6x-72\right):2-84=5628:28\)
\(\left(6x-72\right):2-84=201\)
\(\left(6x-72\right):2=201+84\)
\(\left(6x-72\right):2=285\)
\(6x-72=285.2\)
\(6x-72=570\)
\(6x=642\)
\(x=107\)
vay \(x-107\)
c) \(71.2-\left(2x+5\right).6=100\)
\(142-\left(2x+5\right).6=100\)
\(\left(2x+5\right).6=142-100\)
\(\left(2x+5\right).6=42\)
\(2x+5=7\)
\(2x=2\)
\(x=1\)
vay \(x=1\)
a, (X-35)-120=0
X-35 =120+0
X-35 =120
X =120+35
X =155
b,124+(118-X)=217
118-X =217-124
118-X=93
X=118-93
X=25
c,156-(X+61)=82
X+61=156-82
X+61=74
X =74-61
X =13
k cho mình đi rồi mình k lại cho
a,(x-35)-120=0
x-35=120
x=120+35
x=155
b,124+(118-x)
118-x=217-124
118-x=93
x=118-93
x=25
c,156-(x+61)=82
x+61=156-82
x+61=74
x=74-61
x=13
( x - 1 ) + 5 = 17
x - 1 = 17 - 5
x - 1 = 12
x = 12 + 1
x = 13
( x - 78 ) . 2015 = 0
x - 78=0:2015
x - 78=0
x=0+78
x=78
( y - 14 ) : 2 = 3
y - 14=3.2
y - 14=6
y=6+14
y=20
y - 14 : 2 = 3
y - 7 = 3
y=3+7
y=10
124 + 118 - x = 217
118 - x = 217-124
118 - x = 93
x=118-93
x=25
x - 32 : 16 = 48
x - 2 = 48
x=48+2
x=50
a, 124 + (118 - x) =217
118 - x = 217 -124
118 - x = 93
x = 118 - 93
x = 25
Vậy x = 25
b, 814 - (x - 303) =712
x - 303 = 814 - 712
x - 303 = 102
x = 102 + 303
x = 405
Vậy x = 405
c, x - 32 : 16 =48
x - 2 = 48
x = 48 +2
x = 50
Vậy x = 50
d, (x - 32) : 16 = 48
x - 32 = 48 x 16
x - 32 = 768
x = 768 + 32
x = 800
Vậy x = 800
a) 124 + ( 118 - x ) = 217
118 - x = 217 - 124
118 - x = 93
x = 118 - 93
x = 25
b) 814 - ( x - 303 ) = 712
x - 303 = 814 - 712
x - 303 = 102
x = 102 + 303
x = 405
c) x - 32 : 16 = 48
x - 2 = 48
x = 48 + 2
x = 50
d) ( x - 32 ) : 16 = 48
x - 32 = 48 . 16
x - 32 = 768
x = 768 + 32
x = 800
a)
( x - 35 ) - 112 = 0
=> x - 35 = 0 + 112 = 112
=> x = 112 + 35 = 147
b)
124 + ( 118 - x ) = 27
=> 124 + 118 - x = 27
=> 242 - x = 27
=> x = 242 - 27 = 215
c)
156 - ( x + 61 ) = 82
=> 156 - x - 61 = 82
=> 95 - x = 82
=> x = 95 - 82 = 13
x=25
124 + ( 118 - x ) = 217
118 - x = 217 - 124
118 - x = 93
x = 118 - 93
x = 25