If you subtract 12 from my number and multiply the difference by-3 the result is -54 what is my number

first, make an equation:

then, add twelve to both sides to remove it from the right:

then just divide by (-3) to get the value of x:

he spend 5.1 minutes chatting with his friends

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5 1/10

costs the what? what is the cost of the pants?

step-by-step explanation:

if it is $10, then the price is 14.

take 40% of the cost, and then add the cost.

40% of 10 = 4

4+10 = 14.