Question

Aflați necunoscuta:

[(2,4²:x+2,52)×0,2²+1,8²]÷0,2²=84

Urgent!!!​

Answer 1

Răspuns:

[(2,4²:x+2,52)×0,2²+1,8²]÷0,2²=84

[(5,76:x+2,52)·0,04+3,24]:0,04=84

(5,76:x+2,52)·0,04+3,24=84·0,04

(5,76:x+2,52)·0,04=3,36-3,24

5,76:x+2,52=0,12:0,04

5,76:x=3-2,52

x=5,76:0,48

x=12