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2x = 12 - 3
2x = 9
x = 9/2
7m = 8 + 3m
7m - 3m = 8
4m = 8
m = 8/4 = 2
2x = 12 - 3
2x = 9
x = 9/2
maka x = 9/2 atau 4,5
7m = 8 + 3m
7m - 3m = 8
4m = 8
m = 8/4
m = 2
Jadi m = 2