Question

{[(280-y):3+10]×5-20}:8=60

120-{100-2×[64+(20-18:a)]:4}=61

200-{100-2×[58+(30-18:y)]:4}=141

500-[(1460-4a):10+431]:3=353

Ajutati-ma va rog!!!

Answer 1

{[(280-y):3+10]×5-20}:8=60
[(280-y):3+10]×5-20=60×8
[(280-y):3+10]×5-20=480
[(280-y):3+10]×5=480+20
[(280-y):3+10]×5=500
(280-y):3+10=500:5
(280-y):3+10=100
(280-y):3=100-10
(280-y):3=90
280-y=90×3
280-y=270
y=280-270
y=10



120-{100-2×[64+(20-18:a)]:4}=61
100-2×[64+(20-18:a)]:4=120-61
100-2×[64+(20-18:a)]:4=59
2×[64+(20-18:a)]:4=100-59
2×[64+(20-18:a)]:4=41
2×[64+(20-18:a)]=41×4
2×[64+(20-18:a)]=164
64+(20-18:a)=164:2
64+(20-18:a)=82
20-18:a=82-64
20-18:a=18
18:a=20-18
18:a=2
a=18:2
a=9


200-{100-2×[58+(30-18:y)]:4}=141
{100-2×[58+(30-18:y)]:4}=200-141
100-2×[58+(30-18:y)]:4=59
2×[58+(30-18:y)]:4=100-59
2×[58+(30-18:y)]:4=41
2×[58+(30-18:y)]=41×4
2×[58+(30-18:y)]=164
58+(30-18:y)=164:2
58+(30-18:y)=82
30-18:y=82-58
30-18:y=24
18:y=30-24
18:y=6
y=18:6
y=3


500-[(1460-4a):10+431]:3=353
[(1460-4a):10+431]:3=500-353
[(1460-4a):10+431]:3=147
(1460-4a):10+431=147×3
(1460-4a):10+431=441
(1460-4a):10=441-431
(1460-4a):10=10
1460-4a=10×10
1460-4a=100
4a=1460-100
4a=1360
a=1360:4
a=340

Answer 2

{[(280-y):3+10]×5-20}:8=60
[(280-y):3+10]x5-20=60x8
[(280-y):3+10]x5-20=480
[(280-y):3+10]x5=480+20
[(280-y):3+10]x5=500
(280-y):3+10=500:5
(280-y):3=100-10
280-y=90x3
y=280-270
y=10


120-{100-2×[64+(20-18:a)]:4}=61
100-2x[64+(20-18:a)]:4=120-61
2x[64+(20-18:a)]:4=100-59
2x[64+(20-18:a)]=41x4
64+(20-18:a)=164:2
20-18:a=82-64
20-18:a=18
18:a=20-18
18:a=2
a=18:2
a=9

200-{100-2×[58+(30-18:y)]:4}=141
100-2x[58+(30-18:y)]:4=200-141
100-2x[58+(30-18:y)]:4=59
2x[58+(30-18:y)]:4=100-59
2x[58+(30-18:y)]:4=41
2x[58+(30-18:y)]=41x4
2x[58+(30-18:y)]=164
58+(30-18:y)=164:2
58+(30-18:y)=82
30-18:y=82-58
18:y=30-24
18:y=6
y=18:6
y=3

500-[(1460-4a):10+431]:3=353
[(1460-4a):10+431]:3=500-353
[(1460-4a):10+431]:3=147
[(1460-4a):10+431]=147x3
(1460-4a):10+431=441
(1460-4a):10=441-431
(1460-4a):10=10
1460-4a=10x10
4a=1460-100
4a=1360
a=1360:4
a=340