Question

What is the answer? It is very hard for me can anyone answer me please. ​

Answer 1

Given-

A + A + A = 30

B + A + C = 60

C - B = 10

A + B + C + D = 100

To Find-

Value of A, B, C, D

Now,

A + A + A = 30

» 3A = 30

» A = 30/3

• » A = 10

And

C - B = 10

• » C - 10 + B

And

B + A + C = 60

»B + 10 + 10 + B = 60

»2B = 60 - 20

»2B = 40

B = 40/2

• » B = 20

And

C = 10 + B

»10 + 20

• » C = 30

And

A + B + C + D = 100

»10 + 20 + 30 + D = 100

»D = 100 - 60

• » D = 40

Hence,

The value of A = 10, B = 20, C = 30, D = 40

Answer 2

-- A+A+A = 30, means A = 10.

-- B + A + C = 60 and as A= 10, B + C = 50

-- C - B = 10 and also C + B = 50, So, C will be 30 and B will be 20.

-- A + B+ C + D = 100, So, D = 40.

Answer, A = 10, B = 20, C = 30, D= 40