Question

If 85c-340a=1009 and 425a+ 85b = 1286 find the average of a,b a,b and c

Answer 1

Step-by-step explanation:

Given If 85c-340a=1009 and 425a+ 85b = 1286 find the average of a,b a,b and c

• Given equations are  
•                                   85 c – 340 a = 1009 and 425 a + 85 b = 1286
• Now we need to find the average of a,b and c.
• So adding both the equations we get
•                           85 c – 340 a = 1009
•                            85 b + 425 a = 1286
•          So we get 85 b + 85 c + 85 a = 2295
•                          85 (a + b + c) = 2295
•                   Or a + b + c = 2295 / 85
•                    Or a + b + c = 27
•                 Now average will be a + b + c / 3 = 27 / 3 = 9

Reference link will be

https://brainly.in/question/4418821

Answer 2

Answer:

9

Step-by-step explanation:

Add the equations first

85b + 425a = 1286

85c - 340a = 1009

_____________________

85b + 85c + 85a = 2295

_____________________

So, we can take 85 common

85(a+b+c) = 2295

=> a+b+c = 2295/85

=> a+b+c = 27

Mean of a,b,c = (a+b+c)/3

=> 27/3

=> 9

So, the answer is 9