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sema29
@sema29
June 2022
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Решите уравнение 9.(x-4)=405+5. (2x+4) 40-5.(3x-7)+4.(x+17)=0 2.(3x-1)=101-2.(2x-51) 3.(x-1)-25= 4 .(x-3)
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katja20161
1)9(х-4)=405+5(2х+4); 9х-36=405+10х+20; 9х-36=10х+425; 9х-10х=425+36; -х=461; х=-461. 2)40-5(3х-7)+4(х+17)=0; 40-15х+35+4х+68=0; -11х+143=0; -11х=-143; х=143:11; х=13. 3)2(3х-1)=101-2(2х-51); 6х-2=101-4х-102; 6х-2=-4х-1; 6х+4х=-1+2; 10х=1; х=10. 4)3(х-1)-25=4(х-3); 3х-3-25=4х-12; 3х-28=4х-12; 3х-4х=-12+28; -х=16; х=-16.
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sema29
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