Question

x - 240 : 12 = 8 ; b, 19 + 225 : (6-x) = 64 ; 2 mũ x + 5.2 mũ x+2

Answer 1

a: x-240:12=8

=>x-20=8

=>x=28

b: \(19+\dfrac{225}{6-x}=64\)

=>\(\dfrac{225}{6-x}=45\)

=>6-x=5

=>x=1

c: Đề thiếu rồi bạn

Answer 2

\(X-240:12=8\\ X-20=8\\ X=8+20=28\\ ---\\ 19+225:\left(6-X\right)=64\\ 225:\left(6-X\right)=64-19=45\\ 6-X=225:45=5\\ X=6-5=1\)