Question

Emma has 53 marbles she gets some marbles from Fred then she gives 10 marbles to yessir she how has 58 how many does she gets from Fred

Answer 1

53 + x - 10 = 58 (x = marbles Fred gave)
53 + x = 68 (use operations on both sides, subtract 10 from left side and add 10 to right side)
x = 68-53 (switch the placement around)
x = 15
Fred gave her 15 marbles.