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Matematyka wokół nas 1

I. &nbsp; −9(2+y)−3y+8=−2(4y+5) −18−9y−3y+8=−8y−10 −10−12y=−8y−10 −12y+8y=−10+10 −4y=0 y=0

a)&nbsp; 2x−21​(3x−2)=47​−x 2x−23​x+1=143​−x 2x−121​x+x=143​−1 121​x=43​∣:121​ x=43​⋅32​

a) x9<svg xmlns="http://www.w3.org/2000/svg" width='400em' height='1.08em' viewBox='0 0 400000 1080' preserveAspectRatio='xMinYMin slice'><path d='M95,702
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M834 80h400000v40h-400000z'/></svg>​+38<svg xmlns="http://www.w3.org/2000/svg" width='400em' height='1.08em' viewBox='0 0 400000 1080' preserveAspectRatio='xMinYMin slice'><path d='M95,702
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M834 80h400000v40h-400000z'/></svg>​ 3x−4=5x+2 3x−5x=2+4 −2x=6∣:(−2) x=−3 &nbsp; b)&nbsp; 4<svg xmlns="http://www.w3.org/2000/svg" width='400em' height='1.08em' viewBox='0 0 400000 1080' preserveAspectRatio='xMinYMin slice'><path d='M95,702
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M834 80h400000v40h-400000z'/></svg>​(x+40)=−364<svg xmlns="http://www.w3.org/2000/svg" width='400em' height='1.08em' viewBox='0 0 400000 1080' preserveAspectRatio='xMinYMin slice'><path d='M95,702
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4x−3(2−x)=5n−4(2x−1)

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