Aflati pe X din:
a) 34-2•(2660+76÷x)÷893=28
b) 51-(2660÷76+x)÷23=28
Prin metoda mersului invers, va rog!
Răspunsuri la întrebare
Răspuns:
Explicație pas cu pas:
34 - 2 x ( 2660 + 76 : X ) : 893 = 28
2 x ( 2660 + 76 : X ) : 893 = 34 - 28
2 x ( 2660 + 76 : X ) : 893 = 6
( 2660 + 76 : X ) : 893 = 6 : 2
( 2660 + 76 : X ) : 893 = 3
2660 + 76 : X = 893 x 3
2660 + 76 : X = 2679
76 : X = 2679 - 2660
76 : X = 19
X = 76 : 19
X = 4
b) 51 - ( 2660 : 76 + X ) : 23 = 28
51 - ( 35 + x ) : 23 = 28
( 35 + X ) : 23 = 51 -28
( 35 + X ) : 23 =23
35 + X = 23 x 23
35 + X = 529
X = 529 - 35
X = 494
a)
34 - 2 × ( 2660 + 76 : x ) : 893 = 28
2 × ( 2660 + 76 : x ) : 893 = 34 - 28
2 × ( 2660 + 76 : x ) : 893 = 6
2 × ( 2660 + 76 : x ) = 6 × 893
2 × ( 2660 + 76 : x ) = 5358
2660 + 76 : x = 5358 : 2
2660 + 76 : x = 2679
76 : x = 2679 - 2660
76 : x = 19
x = 76 : 19
x = 4
b)
51 - ( 2660 : 76 + x ) : 23 = 28
51 - ( 35 + x ) : 23 = 28
( 35 + x ) : 23 = 51 - 28
( 35 + x ) : 23 = 23
35 + x = 23 × 23
35 + x = 529
x = 529 - 35
x = 494