Reshite uravnenie (3x+45)*7-241=2993 18(2x-1)+36=324 obyasnite podrobno kak reshat, pojsluista

(3х+45)*7-241=2993
(3х+45)*7=2993+241
(3х+45)*7=3244 l /7
3х+45=462
3х=462-45
3х=417 l/3
х=139

(3х+45)*7=2993+241
(3х+45)*7=3234
3х+45=3234:7
3х+45=462
3х=462-45
3х=417
х=417:3
х=139

18(2x-1)=324-36
18(2x-1)=288
2х-1=288:18
2х-1=16
2х=16+1
2х=17
х=8,5  или 8 1/2