Question

[Võ Trí Kính]

Tìm X:

a. X + 3 1/2 + X = 24 1/4

b. X nhân 7 phần X =7

Answer 1

[Tô Hoài An]

x + \(3\frac{1}{2}\)+ x = \(24\frac{1}{4}\)

x + x = \(24\frac{1}{4}-3\frac{1}{2}\)

x X 2 = \(\frac{97}{4}-\frac{7}{2}\)

x X 2 = \(\frac{83}{4}\)

b ) x X \(\frac{7}{x}\)= 7

\(\frac{x}{1}\)x \(\frac{7}{x}\)= 7

= > x = 1

Answer 2

[Doraemon]

a) X = 10,25

b) X = 1

    Cách làm nè!!!

a)  \(x+3\frac{1}{2}+x=24\)

\(x\cdot2+3,5=24\)

\(x\cdot2=24-3,5\)

\(x\cdot2=20,5\)

\(x=20,5\div2\)

\(x=10,25\)

b) \(x\cdot\frac{7}{x}=7\)

\(\frac{x}{1}\cdot\frac{7}{x}=7\)

\(\Rightarrow x=1\)