Integers are just a fancy name for what we called Numbers as kids. 1,2,3 etc. As math gets into more complex situations than 1+3, we needed words to specify whole numbers, not 1.03 or even irrational numbers like pi. This is because the concept of numbers and what counts as a number starts to include values that we didn’t use as kids. (Toddlers don’t usually count 1.0000000001, 1.00000000002, etc. )
An equation like you e posted is just a balancing situation, make the two sides the same. So, assuming I’m reading this right, you’re subtracting 2 numbers from another number, and want it to equal adding 2 numbers?
100 – 20- 5 = 50+25?
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