If the total number of marbles is 102, Mark has 20 marbles while Don has 82 marbles.
To answer this word problem, read and understand first the problem.
"Don has 2 more than 4 times the number of marbles Mark has."
Out of this statement, we can come up with the expression,
Don = 2 + (4 x Mark) (equation 1)
Next, the total number of marbles they have is 102.
Don + Mark = 102 (equation 2)
From this expression, if we subtract the number of marbles Mark has from the total number, we can get the number of marbles Don has.
Don = 102 - Mark (equation 3)
Equating the 1st and 3rd equation,
Don = 2 + (4 x Mark) = 102 - Mark
2 + (4 x Mark) = 102 - Mark
let x = Mark's
2 + (4x) = 102 - x
4x + x = 102 - 2
5x = 100
x = 20
Mark has 20 marbles.
Meanwhile, use either the 1st or 3rd equation to know the number of marbles Don has.
Don = 102 - Mark (equation 3)
Don = 102 - 20
Don = 82
For more examples of mathematical expressions to solve word problems:, brainly.com/question/13818690.
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