2x+2y=10
x=1
solve by substitution

x = 1 and y = 4

Step-by-step explanation:

2 * 1  + 2y = 10

2 + 2y = 10

2y = 10-2

2y = 8

y = 4

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.