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01Соня
@01Соня
July 2022
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Решите пожалуйста
-5(5-х)-4х=18
1/3(3y-6)-2/7(7x-21)=9
5,4(3y-2)-7,2(2y-3)=1,2
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Answers & Comments
anastasija1981
-5(5-х)-4х=18
-10+5x-4x=18
x=18+10
x=28
1/3(3y-6)-2/7(7x-21)=9
*3y-
*6 -
*7x+
*21=9
y-2-2x+6=9
тут 2 неизвестных это точно?
5,4(3y-2)-7,2(2y-3)=1,2
16,2у-10,8-14,4у+21,6=1,2
1,8у=1,2+10,8-21,6
1,8у=-9,6
у=-5,34
1 votes
Thanks 1
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Answers & Comments
-10+5x-4x=18
x=18+10
x=28
1/3(3y-6)-2/7(7x-21)=9
*3y-*6 - *7x+*21=9
y-2-2x+6=9
тут 2 неизвестных это точно?
5,4(3y-2)-7,2(2y-3)=1,2
16,2у-10,8-14,4у+21,6=1,2
1,8у=1,2+10,8-21,6
1,8у=-9,6
у=-5,34