Question

Hi I need help today I had a long argument with my friend about this question

a+b=30 but a is twice than b please solve this question and than tell me the statement a is twice than b means in mathematics so I can explain it to her
​

Answer 1

Sure, I can help you with that.

The statement "a is twice than b" means that a is equal to 2 times b. In other words, b is equal to half of a. We can express this mathematically as:

a = 2b

We can also use this information to solve the equation a + b = 30. Substituting the first equation into the second equation, we get:

2b + b = 30

Combining like terms, we get:

3b = 30

Dividing both sides by 3, we get:

b = 10

Substituting this value back into the first equation, we get:

a = 2(10)

Simplifying, we get:

a = 20

Therefore, the solution to the system of equations is a = 20 and b = 10.