Решите пожалуйста номер 293!. Created by TaisiyaAgrest. matematika-ru

Решите пожалуйста номер 293!...

Исаева7 Раскрываем скобки:
0,8x-28-1,5x-30=5
0,8x-28-1,5x-30-5=0
-1x-63=0
-1x=63
x=63/-1
x=-63

0 votes Thanks 1

Pacanka202 А) 0,8х–28–1,5х–30=5
–0,7х=63
х=–90

б) (112•5)/(5•16)х–(112•3)/(5•7)–(351•9)/(10•13)х+(351•4)/(10•9)=–45,9
7х–9,6–24,3х+15,6=–45,9
–17,3х=–51,9
х=3

1 votes Thanks 1

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