2) x - 1/2 = 3/4x |*4
4x - 2 = 3x
4x - 3x = 2
x = 2
Ответ: 2
4) 1 4/5 * y = y + 4
1 4/5 * y - y = 4
4/5 * y = 4
y = 4 : 4/5
y = 4 * 5/4
y = 5
Ответ: 5
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2) x - 1/2 = 3/4x |*4
4x - 2 = 3x
4x - 3x = 2
x = 2
Ответ: 2
4) 1 4/5 * y = y + 4
1 4/5 * y - y = 4
4/5 * y = 4
y = 4 : 4/5
y = 4 * 5/4
y = 5
Ответ: 5