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Dana030602
@Dana030602
July 2022
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please помогите решить 3) ответ-3 4)ответ 5
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11081957vera
3(х+1)
+
2(5-х)
=
16-13х
общ. знам.=24
8 3 12
3*3(х+1)+8*2(5-х) =2*(16-13х)
9(х+1) +16(5-х)=32-26х
9х+9+80+16х=32-26х
9х-15х+26х=32-9-80
19х=-57
х=-3
5(7-2х
) -
4х-2
=
х-19
6*5(7-2х)-2(4х-2)=9(х-19)
3 9 2
30(7-2х)-8х+4=9х-171
210-60х-8х+4=9х-171
9х+8х+60х=210+4+171
77х=385
х=5
2 votes
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Answers & Comments
8 3 12
3*3(х+1)+8*2(5-х) =2*(16-13х)
9(х+1) +16(5-х)=32-26х
9х+9+80+16х=32-26х
9х-15х+26х=32-9-80
19х=-57
х=-3
5(7-2х) - 4х-2 = х-19 6*5(7-2х)-2(4х-2)=9(х-19)
3 9 2
30(7-2х)-8х+4=9х-171
210-60х-8х+4=9х-171
9х+8х+60х=210+4+171
77х=385
х=5