Question

(36:a+63:9):2=8
b+149+[73:8+28:4):4]=396
93-(85-9×9+5×8)-c=5×6+1
(242+360:10-214):(80:5-4×3)×d=1000
94+[(402:2+5×2)×2+8]:5=184
500-[(16×18-192:f):7+15×5+10]:4×7:5=299

Dau coroana

Answer 1

a.

( 36 : a + 63 : 9 ) : 2 = 8
( 36 : a + 7 ) = 8 × 2
( 36 : a + 7 ) = 16
Notam cu x ==== 36 : a
( x + 7 ) = 16
x = 16 - 7
x = 9

36 : a = x

36 : a = 9
a = 36 : 9
a = 4

V: ( 36 : 4 + 63 : 9 ) : 2 = 8
( 9 + 7 ) : 2 = 8
16 : 2 = 8 ====== Adevarat

b.

b + 149 + [ 72 : 8 + 28 : 4 ) : 4 ] = 396
b + 149 + ( 9 + 7 ) = 396 × 4
b + 149 + 16 = 1584
b + 1 65 = 1584
b = 1584 - 165
b = 1419


V: 1419 + 149 + [ 72 : 8 + 28: 4 ) : 4 ] = 396
1568 + ( 9 + 7 ) : 4 = 396
1584 : 4 = 396 ==== Adevarat

c.

93 - ( 85 - 9 × 9 + 5× 8 ) - c = 5 × 6 + 1
93 - ( 85 - 81 + 40 ) - c = 30 + 1
93 - ( 4 + 40 ) - c = 31
93 - 44 - c = 31
49 - c = 31
c = 49 - 31
c = 18

V: 93 - ( 85 - 9 × 9 + 5 × 8 ) - 18 = 5 × 6 + 1
93 - ( 85 - 81 + 40 ) - 18 = 30 + 1
93 - ( 4 + 40 ) - 18 = 31
93 - 44 - 18 = 31
49 - 18 = 31 ===== Adevarat

d.

( 242 +360 : 10 - 214 ) : ( 80 : 5 - 4 × 3 ) × d = 1000
( 242 + 36 - 214 ) : ( 16 - 12 ) × d = 1000
( 278 - 214 ) : 4 × d = 1000
64 : 4 × d = 1000
16 × d = 1000
d = 1000 : 16
d = 62,5

V:
( 242 + 360 : 10 - 214 ) : ( 80 : 5 - 4 × 3 ) × 62,5 = 1000
( 242 + 36 - 214 ) : ( 16 - 12 ) × 62,5 = 1000
( 278 - 214 ) : 4 × 62,5 = 1000
64 : 4 × 62,5 = 1000
16 × 62,5 = 1000 ===== Adevarat


e.

94 + [( 402 : 2 + 5 × 2 ) × 2 + 8 ] : 5 = 184
94 + [( 201 + 10 ) × 2 + 8 ] : 5 = 184
94 + ( 211 × 2 + 8 ) : 5 = 184
94 + ( 422 + 8 ) : 5 = 184
94 + 430 : 5 = 184
94 + 86 = 180 ====== Fals