Question

4*(1,4y-2)-5*(4,2y+1)=-20,7

Answer 1

4 * (1,4у - 2) - 5 * (4,2у + 1) = -20,7
5,6у - 8 - 21у - 5 = -20,7
5,6у - 21у = -20,7 + 8 + 5
-15,4у = -7,7
у = -7,7 : (-15,4)
у = 0,5
Проверка: 4 * (1,4*0,5 - 2) - 5 * (4,2*0,5 + 1) = -20,7
                  4 * (-1,3) - 5 * 3,1 = -20,7
                  -5,2 - 15,5 = -20,7
                  -20,7 = -20,7

Answer 2

5,6y-8-21y-5=-20,7
-15,4y=-7,7
y=0,5

Answer 3

To solve the equation 4(1.4y - 2) - 5(4.2y + 1) = -20.7, you'll want to simplify and isolate the variable y. Here's how you can do it step by step:

1. Distribute the constants on the left side of the equation: 4 * 1.4y - 4 * 2 - 5 * 4.2y - 5 * 1 = -20.7

2. Simplify each term: 5.6y - 8 - 21y - 5 = -20.7

3. Combine like terms on the left side: (5.6y - 21y) - 8 - 5 = -20.7

4. Combine the y terms: -15.4y - 13 = -20.7

5. Add 13 to both sides of the equation to isolate the variable term: -15.4y = -20.7 + 13 -15.4y = -7.7

6. Now, divide both sides by -15.4 to solve for y: y = (-7.7) / (-15.4)

7. Simplify the right side: y = 0.5

So, the solution to the equation is y = 0.5.