Question

rezolvati va rog:
521=5x2x1-0:1:3:5+n

4+[4-(4+4:4x4-4)+a]:4=8

b:6x6:3x3=8+8+9:9+13

10x3x9-30:3:10+11=7xf

(607-299):b+299=607-231

1356:3+[136x75-(324:4:9x3+45)+246-123:3]=

[84+60x100:(7x2+3x2)-14]:[(40-5x2)+(75-4x17)]=

Answer 1

521=5x2x1-0:1:3:5+n
521 = 10+n
n = 521-10
n = 511

4+[4-(4+4:4x4-4)+a]:4=8
[4-(8-4)+a] :4= 8-4
(4-4+a):4 = 4
a = 4×4
a = 16

b:6x6:3x3=8+8+9:9+13
b:36 = 16+1+13
b:36 = 30
b = 30×36
b = 1 080

10x3x9-30:3:10+11=7xf
270-1+11 = 7×f
280 = 7×f
f = 280:7
f = 40

(607-299):b+299=607-231
308:b +299 = 376
308:b = 376-299
308:b = 77
b = 308:77
b = 4

1356:3+[136x75-(324:4:9x3+45)+246-123:3]=
= 452+[10 200-(27+45)+246-41 =
= 452+( 10200-72+205) =
= 452+10 333 =
= 10 785

[84+60x100:(7x2+3x2)-14]:[(40-5x2)+(75-4x17)]=
= (84+6 000:20-14):(30+7) =
= (84+300-14): 37 =
= 370 :37 =
= 10