x/2+x-2/4 = x+2/9
x/2+x-х = 2/9+2/4
x/2 = 2/9+2/4
(x+18)/36 = (2+4)/36+(2+9)/36
(x+18)/36 = 6/36+11/36
(x+18)/36 = 17/36
x/36+18/36 = 17/36
x/36 = 17/36-18/36
x/36 = -1/36
х=13/9
или
2 способ на фото
ответ тот же
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x/2+x-2/4 = x+2/9
x/2+x-х = 2/9+2/4
x/2 = 2/9+2/4
(x+18)/36 = (2+4)/36+(2+9)/36
(x+18)/36 = 6/36+11/36
(x+18)/36 = 17/36
x/36+18/36 = 17/36
x/36 = 17/36-18/36
x/36 = -1/36
х=13/9
или
2 способ на фото
ответ тот же