Solve this by cross multiplication
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here is your answer.
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Q;
X/3 + Y/4=11..........1
5X/6 - Y/3 =-7........2
1mul.12
4x + 3y=132.....3
2mul.18
15x - 6y =126......4
form 3
x=132-3y/4.......5
put 5 in 4
15(132-3y/4)-6y=126
1980-45y/60-6y=126
-45y - 6y=-111240
y=-111240/51
y=2181.17....
use y=2181.17 in 3
so, 4x+3mul.2181.17=132
4x+ 6543.52=132
x=132-6543.52/4
x=-6411.52/4
x=-1602.88
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