Question

[Thành Tâm]

goi x la stn biet rang neu lay x nhan 2 roi cong 50 vao tich nhan tong voi 5 duoc bao nhieu roi tru 200 roi chia cho 10 duoc ket qua la 30

Answer 1

[Nguyễn Tũn]

ta có:

(X x 2 + 50) x 5 -200 :10 =30

 (X x 2 + 50) x 5 -200=30 x 10 =300

(X x 2 + 50) x 5 = 300 + 200 = 500

X x 2+50 = 500 : 50=100

X x 2 = 100 - 50= 50

X = 50:2=25