Question

СРОЧНООООООО!!! Реши уравнение, используя основное свойство пропорции (если ab=cd, то a⋅d=b⋅c):0,2y+5=0,4y−8.Ответ (для отрицательной дроби используй знак «−»): y=

Answer 1

0,2у-0,4у=-8-5
-0,2у=-13
у=-13:(-0,2)
у=65
Ответ: у = 65

Answer 2

Solving the Equation using the Proportion Property

To solve the equation 0.2y + 5 = 0.4y - 8 using the proportion property, we need to isolate the variable y on one side of the equation. Here's how we can do it step by step:

Step 1: Simplify the equation by subtracting 0.2y from both sides: 0.2y + 5 - 0.2y = 0.4y - 8 - 0.2y 5 = 0.4y - 0.2y - 8

Step 2: Combine like terms on the right side of the equation: 5 = 0.2y - 8

Step 3: Add 8 to both sides of the equation to isolate the variable term: 5 + 8 = 0.2y - 8 + 8 13 = 0.2y

Step 4: Divide both sides of the equation by 0.2 to solve for y: 13 / 0.2 = 0.2y / 0.2 65 = y

Therefore, the solution to the equation 0.2y + 5 = 0.4y - 8 is y = 65.

Please note that the solution is a positive value, as indicated by the absence of a negative sign in the equation.