2 + x/5 = 4/9
10/5 + x/5 = 4/9 | приведём к общему знаменателю
90/45 + 9x/45 = 20/45
9x/45 = -70/45
x/9 = -14/5
5x = -14*9
5x = -126
x = -25.2
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2 + x/5 = 4/9
10/5 + x/5 = 4/9 | приведём к общему знаменателю
90/45 + 9x/45 = 20/45
9x/45 = -70/45
x/9 = -14/5
5x = -14*9
5x = -126
x = -25.2