Răspuns
[15•(10x-11)-120]•10-125=25
(150x-165-120)•10-125=25
(150x-285)•10-125=25
1500x-2850-125=25
1500x-2975=25
1500X=25+2975
1500x=3000
X=3000÷1500
×=2
{3•[(4+a)•8]+10}÷5=98
[3(32+8a)+10]÷5=98
(96+24a+10)÷5=98
(106+24a)÷5=98
106+24a=98•5
106+24a=490
24a=490-106
24a=384
a=384÷24
a=16
Explicație pas cu pas: