Sagot :
Cevap:
145
Adım adım açıklama:
7x+77=280
77 yi karşıya atarız
280-77=203
7x=203
Her tarafı 7 ye böl
X= 29
29.10=290
290/2=145
Cevap:145
Adım adım açıklama:
280-77=203
203÷7=29
29x10=290
290÷2=145
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