63:21=3
45:9=5
3+5=8
ответ: 8
1) х + 156 = 567 + 189 ( 567 + 189 = 756)
х = 756 - 156
х = 600
___________________________________
600 + 156 = 567 + 189
600 = 600
2) 89 + х = 900 - 185 ( 900 - 185 = 715)
х = 715 - 89
х = 626
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89 + 626 = 900 - 185
626 = 626
Х*100=4500
х=4500:100
х=45
проверка
45*100=4500
4500=4500
х:100=4500
х=4500*100
х=450000
проверка
450000:100=4500
4500=4500
X:(132*458)=38
x:38=132*458
x:38=60456
x=60456*38
x=2297328