Question

margarit liked to balance things. she balanced 3 pencil sharpeners and 2 one gram blocks with a 100 gram weight and another one gram block. she let x stand for the weight of one pencil sharpener and she claimed that x=30grams. was she correct if not how much died each pencil sharpener weigh/

If each pencil weighs 30 grams, 3 pencils weigh 90 grams, so 3 pencils and 2 one gram blocks would be 92 grams. On the right is 101 grams. Those don't balance. You want:
3x + 2 = 101.
3x = 99
x = 33 grams.

Answer 1

Each pencil sharpener weighs 33 grams. Margarit was not correct in claiming they weighed 30 grams each.