(3.2 / 5)m = 3 multiply both sides by (5 / 3.2)
m = 3 * 5 / 3.2 The algebra problem is now basic math.
m = 4.6875
Check:
3.2(4.6875) / 5 = 3
15 / 5 = 3 ■
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40.6667
21 divided in to 3 equal parts = 7
4 times 2 minus 3 divided by 3 is equal to 8 minus 3 divided by 3 which is equal to 5 divided by 3 which gives you 1 and 2 thirds.