Question

tìm số tự nhiên x,biết 

a)( x - 35 ) - 120=0    

b)124 + (118 - x )=217

c)156 - ( x + 61 )=82

Answer 1

a) 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

Answer 2

a) x-35 = 120 => x=120+35 => x = 155

vậy x=155

b) 124 +(118-x) = 217 => 118-x = 217 - 124 

=> 118-x = 93

=> x = 118 - 93

=> x= 25

vậy x=25

c) 156-(x+61) = 82 

=> x+61 = 156 - 82

=> x+61 = 74

=> x = 74 - 61

=> x = 13

vậy x=13

Answer 3

a, (x -35 ) - 120 = 0

( x - 35 ) =0 + 120

( x - 35 ) = 120

x = 120 + 35

x = 155

Answer 4

a) ( x - 35 ) - 120 = 0

<=> x - 35 = 120

<=> x = 155

b) 124 + ( 118 - x ) = 217

<=> 118 - x = 93

<=> x = 25

c) 156 - ( x + 61 ) = 82

<=> x + 61 = 74

<=> x = 13