Tìm x a) 2/9 - 7/8 x = 1/3 b) 4/5 + 5/7 : x = 1/6
Giải thích
a)
29−78.x=13 78.x= 29−13 78.x=−13 x = −13:78 x = −821
b)
45+57:x=16 57:x = 16−45 57:x = −1930 x = 57:−1930 x=−150133
a)
29−78.x=13 78.x= 29−13 78.x=−13 x = −13:78 x = −821
b)
45+57:x=16 57:x = 16−45 57:x = −1930 x = 57:−1930 x=−150133