Предмет: Математика, автор: masakovalchuk92

Т. Розв'яжи рівняння. а) 60 + (х – 20) = 100; ;

Ответы

Автор ответа: yaroslavv1978

0

Ответ:

60+(х-20)=100

х-20=100-60

х-20=40

х=20+40

х=60

60-20=100-60

40=40

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