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3x+4y=6 ×2
2x-y=-7 ×3
menjadi:
6x+8y=12
6x-3y=-21
________–
11y=33
y=33/11=3
lalu kita subsitusikan y ke pers kedua.
2x-y=-7
2x-3=-7
2x=-7+3
2x=-4
x=-4/2=-2
semoga membantu...
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