39 by x - 2b by y= -5
9 by x +3b by y = 2
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Step-by-step explanation:
please refer to the written and Qwerty text
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Step-by-step explanation:
117/x-6b/y=-15
18/x+6b/y=4
135/x=-11x=-12.2645
18/x+6b/y=4
18/12.3+6b/y=4
6b/y=2.5
y=6b/2.5
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