Question

X-20%xX=216

Answer 1

X - 20% x X = 216

X - 20/100 x X = 216

X x (1 - 20/100) = 216

X x 4/5 = 216

X = 216 : 4/5

X = 270

(Tíck cho mình với nhé!)

Answer 2

x -20% x X = 216

x -1/5 x X=216

(1-1/5)x X =216

1x X - 1 x 1/5 =216

4/5 x X= 216

x = 216:4/5 =270