Step-by-step explanation:
Mary's age = x
Billi's age = x+6
So, Mary age + Billi age = x + (x + 6)
Sum of their ages = 2x + 6
So, 2x + 6= 48
2x = 48 - 6
2x = 42
x = 42/2
Mary age = x = 21
And Billi age = x +6= 21 + 6 = 27
So Mary = 21
And Billi = 27
Lets check!
21 + 27 = 48
So therefore their ages add up to 48
So the answer is correct!
Answer:
88
5+(6x8)=88
(f-g)(x) = 11x+4
(f-g)(x) = f(x) - g(x)
This means we have
3x+10x-(2x-4)
This gives us
3x+10x-2x--4
3x+10x-2x+4
13x-2x+4
11x+4