7/x+8/y=2, 2/x+12/y=20 solve
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Answered by
60
Answer: x=-1/2 y=1/2
Step-by-step explanation:
7/x+8/y=2
7y+8x=2xy -----------1
2y+12x=20xy----------2
7(eq2) - 2(eq1)
14y+84x=140xy
- 14y+16x=4xy
= 68x=136xy
= y=1/2
substituting y value in equation 1
x=-1/2
Answered by
15
7÷X+8÷y=2
1÷X=a;1÷Y=b
7(1÷X)+8(1÷Y)=2
7a+8b=2----------------[1]
2÷X+12÷Y=20
2(1÷X)+12(1÷Y)=20
2a+12b=20-------------[2]
7a+8b=20---------------[1]
2a+12b=20--------------[2]
2(7a+8b=2)
7(2a+12b=20)
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