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( x - 35 ) - 120 = 0
⇔ x - 35 = 120
⇔ x = 155
Vậy x = 155
124 + ( 118 - x ) = 217
⇔ 118 - x = 93
⇔ x = 25
Vậy x = 25
156 - ( x + 61) = 32
⇔ x + 61 = 124
⇔ x = 63
Vậy x = 63
(x-35)-120=0
(x-35)=0+120
(x-35)=120
x=120+35
x=155
vậy x=155
124+(118-x)=217
(118-x)=217-124
(118-x)=93
x=118-93
x=25
ậy x=25
156-(x+61)=32
(x+61)=156-32
(x+61)=124
x=124-61
x=63
vậy x=63
(x-35)-120=0
x-35=0+120
x-35=120
x=120+35
x=155
124+(118-x)=217
118-x=217-124
118-x=93
x=118-93
x=25
156-(x+61)=32
x+61=156-32
x+61=124
x=124-61
x=63
156 - ( x + 61 ) = 82
ý cuối cùng la 13
(x+61)=152-82
(x+61)=70
x=70-61
x=9
vậy x=9
156-(x+61)=82
(x+61)=156-82
(x+61)=74
x=74-61
x=13
vậy x=13