Question

\(\dfrac{3}{x-7}=\dfrac{27}{135}\)

Tìm x

 

Answer 1

\(\dfrac{3}{x-7}=\dfrac{27}{135}\)

\(27\times\left(x-7\right)=3\times135\)

\(27\times x-189=405\)

\(27\times x=405+189\)

\(27\times x=594\)

\(x=594\div27\)

\(x=22\)

Answer 2

3/(x - 7) = 27/135

3 × 135 = (x - 7) × 27

(x - 7) × 27 = 405

x - 7 = 405 : 27

x - 7 = 15

x = 15 + 7

x = 22

Answer 3

@kiều vũ linh theo đề thì ta phải có:

\(3\cdot135=27\cdot\left(x-7\right)\)

Answer 4

Đồng ý với anh Nhân