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m - 2/3n = 4 2/3 <=> m - 2/3n = 14/3 <=> ( dikalikan 3 ) = 3m - 2n = 14
6m + n = 53 (x2)
3m - 2n = 14 (x1)
------------------
12m + 2n = 106
3m - 2n = 14
------------------- +
15m = 120
m = 120/15
m = 7
6m + n = 53 (x1)
3m - 2n = 14 (x2)
--------------------
6m + n = 53
6m - 4n = 28
------------------- -
5n = 25
n = 25/5
n = 5
2.)1\4x-1\5y=7\10 <=> (dikalikan 20) = 5x - 4y = 14
1\3x-1\4y=5\1 <=> 1/3x-1/4y = 5 (dikalikan 12) <=> 4x - 3y = 60
5x - 4y = 14 (x3)
4x - 3y = 60 (x4)
-----------------
15x - 12y = 42
16x - 12y = 240
----------------- -
-x = -198
x = 198
5x - 4y = 14 (x4)
4x - 3y = 60 (x5)
-----------------
20x - 16y = 56
20x - 15y = 300
-------------------- -
- y = 244
y = -244
Semoga membantu... maaf kalu salah :)