Răspunsuri

2014-10-01T17:56:34+03:00
2x+17=399
2x=399-17
2x=382
x=382:2
x=191

7x-514=984
7x=984+514
7x=1498
x=1498:7
x=214

384-(x+56)=148
x+56=148+384
x+56=532
x=532-56
x=476