(x-12)+254=404
x-12 +254=404
242 + х = 404
х = 162
340+(x+120)=790
340+x+120 =790
460 + х = 790
х = 330
38x+15=91
38х=76
х= 2
(x-12)+254=404
x-12 +254=404
242 + х = 404
х = 162
340+(x+120)=790
340+x+120 =790
460 + х = 790
х = 330
38x+15=91
38х=76
х= 2