3x-8y=-2 9×+4y=8 solve these equation
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Answer:
3x - 8y = -2
-5xy = -2
xy = -2 + 5 = 3
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Step-by-step explanation:
3x-8y=2 ->(1)
9x+4y=8 ->(2)
add (1) &(2)
(1)×3 =9x-24y=6
9x+4y=8
-> 20y=14
y=14/20=0.7
•y=0.7
substitute y=0.7 in (2)
9x+4(0.7)=8
9x+2.8=8
9x=8-2.8
9x=5.2
x=5.2/9=0.5
•x=0.5
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