Question

Tìm X,biết:

a)Xx4+1/2xX=55,35

b)X-20%xX=216

Giúp me!!!:)))

Answer 1

a) \(x\times4+\frac{1}{2}\times x=55,35\)

   \(x\times\left(4+\frac{1}{2}\right)=55,35\)

   \(x\times4,5=55,35\)

   \(x=55,35:4,5=12,3\)

b) \(x-20\%\times x=216\)

    \(x-0,2\times x=216\)

    \(x\times\left(1-0,2\right)=216\)

    \(x\times0,8=216\)

    \(x=216:0,8=270\)

Answer 2

Cảm ơn bn rất rất rất nhiều nha!!!😁😁😁