Решите уравнение:3класс : 1) x+2=7•9
2) x-20=63:9
3)x+700=890
4)x•2=14+16
5)x:2=27-20
6)6890-x=700
7)56-x=48:6
8)72:x=45:5
9)x-700=190
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