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x/4 + y/3 = 1 | x12 | 3x + 4y = 12
x/3 + y/2 = 1 | x 6 | 2x + 3y = 6
3x + 4y = 12 | x1 | 3x + 4y = 12
2x + 3y = 6 | x 1.5 | 3x + 4.5y = 9
--------------------- -
-0.5y = 3
y = -6
x/3 + -6/2 = 1
x/3 + -3 = 1
x/3 = 1+ 3
x/3 = 4
x =12
x + y = 12 - 6
= 6
Semog bermanfaat