Question

[195-(3x-27)]x39=4212

Answer 1

[195 - (3x - 27)] x 39 = 4212

=> 195 - (3x - 27) = 4212 : 39

=> 195 - (3x - 27) = 108

=> 3x - 27 = 195 - 108

=> 3x - 27 = 87

=> 3x = 87 + 27

=> 3x = 114

=> x = 114 : 3

=> x = 38

Vậy ...

Answer 2

\(\left[195-\left(3x-27\right)\right]\cdot39=4212\)

=>\(195-\left(3x-27\right)=\dfrac{4212}{39}=108\)

=>3x-27=195-108=87

=>3x=87+27=114

=>\(x=\dfrac{114}{3}=38\)