Answer:
248
Explanation:
"Eric has 12 bags of green marbles with 8 in each bag."
12 * 8 = 96
Eric has 96 green marbles.
"Then he bought 7 bags of blue marbles. There were 4 blue marbles in each bag."
7 * 4 = 28
Eric has 28 blue marbles.
The total number of marbles Eric has:
96 + 28 = 124
"Eric's brother has twice as many marbles as Eric."
2 * 124 = 248
"How much marbles does his brother have?"
248