2a+6b=100

what is 5a+15b=?

Step-by-step explanation:Simplifying

2a + 6b = 100

Solving

2a + 6b = 100

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-6b' to each side of the equation.

2a + 6b + - 6b = 100 + - 6b

Combine like terms: 6b + - 6b = 0

2a + 0 = 100 + - 6b

2a = 100 + - 6b

Divide each side by '2'.

a = 50 + - 3b

Simplifying

a = 50 + - 3b

5 (50x - 3bx + 50 - a) or 5 (a + 3b) (Depending on the question and what is asked)

Step-by-step explanation:

2a + 6b = 100

a = 50-3b

b = 50/3 - 1/3a

replace

5a + 15b =

5*50-3b + 15*50/3 - 1/3a =

5 (50x - 3bx + 50 - a)

^This would be the answer if we use the same value of a and b from the 2a+6b=100 equation.

If we use a unknown value for a and b. Then, the answer would be 5 (a + 3b).