The difference of twice a number and 7 is 9.Write and solve the equation to find the number

9-7=2x2=4

Step-by-step explanation: this is right.

2x-7=9 x=8

Step-by-step explanation:

2x8=16

16-7=9

answer: ok

step-by-step explanation:

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.