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nignag [31]
3 years ago
14

ASAP HELP!! CAN SOMEONE PLS HELP ME WITH 20? U HAVE TO USE 18 and 19 to help you!!! THANK U SM!

Mathematics
1 answer:
lbvjy [14]3 years ago
8 0
18) Let x be the number of coins in the pouch:

3x + 3 = 9; subtract 3 from each side:

3x + - 3 = 9 -3

3x = 6 . Now divide both side by 3:

x = 2 (in each pouch we have 2 coins)

19) SAME logic:

4x + 1 = 2x + 7; subtract 1 from each side:

4x + 1 - 1 = 2x + 7 - 1
4x = 2x + 6; now subtract 2x from each side:

4x - 2x = 2x + 6 - 2x

2x = 6   and x = 3 (each pouch contains 3 coins)

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