Question

В заданном уравнении вырази переменную a через b: 2a+8b=25. a=12,5....

Answer 1

Ответ:

a=(25-8b)/2

Объяснение:

2a=25-8b

a=(25-8b)/2

Answer 2

To express variable 'a' in terms of 'b' in the equation 2a + 8b = 25, you need to isolate 'a' on one side of the equation. Let's solve for 'a':

Step 1: Subtract 8b from both sides to move the term with 'b' to the other side of the equation: 2a + 8b - 8b = 25 - 8b

Simplifying: 2a = 25 - 8b

Step 2: Divide both sides by 2 to isolate 'a': a = (25 - 8b) / 2

Now, you have 'a' expressed in terms of 'b': a = (25 - 8b) / 2

Since you mentioned that a = 12.5, we can use this information to find the corresponding value of 'b'.

Given a = 12.5, substitute this value into the equation and solve for 'b':

12.5 = (25 - 8b) / 2

Step 1: Multiply both sides by 2 to get rid of the fraction: 25 = 25 - 8b

Step 2: Now, isolate 'b' on one side by moving the term without 'b' to the other side: 8b = 25 - 25

Simplifying: 8b = 0

Step 3: Divide both sides by 8 to find the value of 'b': b = 0

So, when a = 12.5, b = 0.