Ответ:
(85+х)*3-72=219
(85+х)*3=219+72
(85+х)*3=291
85+х=291:3
85+х=97
х=97-85
х=12
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Ответ:
(85+х)*3-72=219
(85+х)*3=219+72
(85+х)*3=291
85+х=291:3
85+х=97
х=97-85
х=12
255+3x-72=219
183+3x=219
3x=219-183
3x=36
x=36:3
x= 12
(171+(36-y)):3=58
(171+36-y):3=58
(207-y):3=58
207-y:3=58
207-y=174
-y=174-207
-y=-33
y=33