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sabinahey
@sabinahey
October 2021
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Буду очень благодарна^^
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5434567890
2.
1) 5(3x-4)+12x=4-3(2x+1)
15x-20+12x=4-6x-3
15x-20+12x-4+6x+3=0
33x-21=0
33x=21
x=21/33
x=7/11
2) x²/x+5=25/x+5
x²-25/x+5=0
(x-5)(x+5)/x+5=0
x-5=0
x=5
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Answers & Comments
1) 5(3x-4)+12x=4-3(2x+1)
15x-20+12x=4-6x-3
15x-20+12x-4+6x+3=0
33x-21=0
33x=21
x=21/33
x=7/11
2) x²/x+5=25/x+5
x²-25/x+5=0
(x-5)(x+5)/x+5=0
x-5=0
x=5