Phần típ theo nè!
Câu 5: Tìm \(x\):
Đề bài : \(xxx\) - \(x
\) x 105 = 30
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Câu 6: Tìm \(x \):
a) \(x \) x 7 + \(x\) = 384.
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b) \( x\)\(x
\) - \(x\) x 2 = 378.
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Câu 7: Tìm số tự nhiên ab biết ab x 9 = 2ab :
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Câu 8: Viết biểu thức sau thành tích 2 thừa số:
Đề bài: ab + ab x 2 + ab x 4 + ab =
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-------- Còn nữa -------
X:0,1+Xx3/4-Xx50%=1025
Xx10+Xx0,75+-Xx0,5=1025
Xx(10+0,75-0,5)=1025
X x 10,25=1025
X=1025:10,25
X=100
\(x\) : 0,1 + \(x\) x \(\dfrac{3}{4}\) - \(x\)x 50% = 1025
\(x\) x 10 + \(x\) x \(\dfrac{3}{4}\) - \(x\) x \(\dfrac{1}{2}\) = 1025
\(x\) x \(\left(10+\dfrac{3}{4}-\dfrac{1}{2}\right)\) = 1025
\(x\) x 10,25 = 1025
\(x\) = 1025 : 10,25
\(x\) = 100