Christina has 6 pieces of candy in her lunchbox. Rachel gives Christina more pieces of candy. Now Christina has 18 pieces of candy. How many pieces of candy did Rachel give Christina?

18 - 6 = 12

When subtracting the new amount by the original amount, you will find the change or the amount that Rachel gave

18 - 6 = 12

So, Rachel gave Christina 12 pieces of candy.

18-6=12

She gave her 12 more pieces of candy.

hope this helps.

the answer is the third / last answer

step-by-step explanation:

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.