He gastado 3/4 partes de mi salario y me quedan $900 pesos ¿cual es mi salario?

Tu salario es $3600

Step-by-step explanation:

Porque hoy tienes 1/4 del salario total. Al principio tienes 4 times esa cantidad. Entonces debes multiplicar $900 x 4 = 3600

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.

341

step-by-step explanation:

all you have to do is 9x31 (which equals 279) and then 20x31 (which equals 620). then you have to subtract. 620-279=341.