Tom saves $5 each month, how many months will he need to save $20?

4 months because:

1 month = 5 dollars

so you add 5 until you get to 20 dollars. And as many times as you added 5 is how

many months. So:

5= 5

5 + 5 = 10

5+5+5= 15

5+5+5+5= 20

^   ^   ^  ^

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your answer is 4 months ^^

step-by-step explanation:

just plug in each number for x and see which ones work and don't

for ex: the reciprocal of 3/4 is 4/3. it is the opposite.

reciprocal definition:

a mathematical expression or function so related to another that their product is one; the quantity obtained by dividing the number one by a given quantity.