Aschool needs 25 butterfly breeding kits, and places an order with an educational company. they already have 7 kits, and they receive a box with x kits, but still need 3 more kits. write the equation that you can use to find out how many kits are in the box.

You can write an equation like this:

7 + x = 25 - 3

The amount they have (7) plus the amount they received (x) is 3 less than the amount they need (25). It simplifies to:

7 + x = 22

To solve, isolate the variable by subtracting 7 from each side:

x = 15

The box contained 15 kits.

assuming you mean addition: addition and subtraction are reverse operations.

step-by-step explanation: