Question

-6(2y-5)-2(3-7y) y=-0,1 С объяснением пожалуйста​

Answer 1

Ответ:

у = 1,14

Пошаговое объяснение:

0,7 (2y - 5) = 0,4 (y - 3) - 1, 16

1,4у - 3,5 = 0,4у - 1,2 - 1,16

1,4у - 0,4у = 3,5 -1,2 - 1,16

у = 1,14

Проверим:

0,7 (2*1,14 - 5) = 0,4 (1,14 - 3) - 1, 16

0,7(2,28 - 5) = 0,456 - 1,2 - 1,16

0,7 * (-2,72) = -1,904

-1,904 = -1,904

Answer 2

To evaluate the expression -6(2y-5)-2(3-7y) with y = -0.1, we can substitute the value of y into the expression and perform the calculations step by step. Let's break it down:

First, we'll substitute y = -0.1 into the expression: -6(2(-0.1)-5)-2(3-7(-0.1))

Next, we simplify the expressions inside the parentheses: -6(-0.2 - 5) - 2(3 + 0.7)

Now, we perform the multiplications within the parentheses: -6(-0.2 - 5) = -6(-5.2) = 31.2 -2(3 + 0.7) = -2(3.7) = -7.4

Finally, we substitute the simplified values back into the expression: 31.2 - 7.4

Subtracting 7.4 from 31.2, we get: 31.2 - 7.4 = 23.8

Therefore, when y = -0.1, the expression -6(2y-5)-2(3-7y) simplifies to 23.8.