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katrina200015
@katrina200015
August 2022
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Помогите решить пожалуйста 84а+25а+7=443 4(9+7х)+21=393. 486:(5х+2)=18. 5(14+b)+6b=158
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Answers & Comments
burovaolga1976
1) 84а+25а+7=443
84а+25а=443-7
109а=436
а=436:109
а=4
2) 4(9+7х)+21=393
36+28х+21=393
28х=393-36-21
28х=336
х=336:28
х=12
3) 486:(5х+2)=18
97.2х+243=18
97.2х=18-243
97.2х=-225
х=-225:97.2
х=-2.31
4) 5(14+b+6b)=158
70+5b+30b=158
5b+30b=158-70
35b=88
b=88:35
b=2.51
2 votes
Thanks 3
masha5551
5(14+b)+6b=158
70+5b+6b=158
70+11b=158
11b=88
b=88:11
b=8
0 votes
Thanks 2
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Answers & Comments
84а+25а=443-7
109а=436
а=436:109
а=4
2) 4(9+7х)+21=393
36+28х+21=393
28х=393-36-21
28х=336
х=336:28
х=12
3) 486:(5х+2)=18
97.2х+243=18
97.2х=18-243
97.2х=-225
х=-225:97.2
х=-2.31
4) 5(14+b+6b)=158
70+5b+30b=158
5b+30b=158-70
35b=88
b=88:35
b=2.51
70+5b+6b=158
70+11b=158
11b=88
b=88:11
b=8