Question

67*. {[(x • 2) • 3] • 5} • 7 = 420
Cat e "x" ofer coroana!!!​

Answer 1

{[( x × 2 ) × 3 ] × 5 } × 7 = 420

{[( x × 2 ) × 3 ] × 5 } = 420 : 7 = 60

[ ( x × 2 ) × 3 ] = 60 : 5 = 12

( x × 2 ) = 12 : 3 = 4

x = 4 : 2

x = 2

Answer 2

Răspuns:

Explicație pas cu pas:

{[(x • 2) • 3] • 5} • 7 = 420 I :7

[(x • 2) • 3] • 5 = 60 I :5

(x • 2) • 3 = 12 I : 3

x * 2 = 4 I : 2

x = 2