Răspuns :
[15 · (10x - 11) - 120] · 10 - 125 = 25
[15 · (10x - 11) - 120] · 10 = 125 + 25 = 150
15 · (10x - 11) - 120 = 150 : 10 = 15
15 · (10x - 11) = 120 + 15 = 135
10x - 11 = 135 : 15 = 9
10x = 9 + 11 = 20
x = 20 : 10
x = 2
/robèrtinni
[15 · (10x - 11) - 120] · 10 = 125 + 25 = 150
15 · (10x - 11) - 120 = 150 : 10 = 15
15 · (10x - 11) = 120 + 15 = 135
10x - 11 = 135 : 15 = 9
10x = 9 + 11 = 20
x = 20 : 10
x = 2
/robèrtinni
[15*(10x-11)-120]*10-125=25
[15*(10x-11)-120]*10=125+25
[15*(10x-11)-120]=150:10
15*(10x-11)=15+120
10x-11=135:15
10x=9+11
10x=20
x=20:10
x=2
[15*(10x-11)-120]*10=125+25
[15*(10x-11)-120]=150:10
15*(10x-11)=15+120
10x-11=135:15
10x=9+11
10x=20
x=20:10
x=2