Aused bookstore will trade two of its books for three of yours if val brings 18 books to trade how many books can she get from the store

12

Step-by-step explanation:

You give them three and get two six times, and therefore get 12 books because you get two times six.

let's solve your equation step-by-step.

4x+2=2x+12

step 1: subtract 2x from both sides.

4x+2−2x=2x+12−2x

2x+2=12

step 2: subtract 2 from both sides.

2x+2−2=12−2

2x=10

step 3: divide both sides by 2.

2x

2

=

10

2

x=5

step-by-step explanation:

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons