0.6 (-2y+3) - 0.4 (9-y) = - 0.3 (y-9) помогите решить уравнение

Question

Тасюта

12 мая, 12:53

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Ответы (2)

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Васяха · Answer 1

0.6 (-2y+3) - 0.4 (9-y) = - 0.3 (y-9)

-1.2y+1.8-3.6+0.4y=-0.3y+2.7

-0.8y-1.8=-0.3y+2.7

-0.8y+0.3y=2.7+1.8

-0.5y=4.5

y=4.5 / (-0.5)

y=-9

Прокл · Answer 2

0.2 (5y-2) = 0.3 (2y-1) - 0.9

y-0.4 = 0.6y-0.3-0.9

y-0.4=0.6y-0.12

y-0.6y = - 0.12 + 0.4

0.4y = - 0.8

y = - 0.8/0.4

y = - 2

Ответ: у = - 2