Question

află valoare lui x
10x+60=900 200-(x-20)=120 (x:2)ori4=100 va rog sa ma ajuati

Answer 1

10x+60=900
10x=900-60
10x=840
x=84

200-(x-20)=120
x-20=120-200
x-20=-80
x=-80+20
x=-60
(x:2)ori 4=100
x:2=100:4
x:2=25
x=25 ori 2
x=50

Answer 2

10x + 60 = 900
10x = 900 - 60
10x = 840
x = 840 : 10
x = 84

200 - ( x - 20 ) = 120
200 - x + 20 = 120
- x = 120 - 200 - 20
- x = - 100 | ( -1 )
x = 100

( x : 2 ) x 4 = 100
x : 2 = 100 : 4
x : 2 = 25
x = 25 x 2
x = 50