Раскрыть скобки и упростить выражение:
1) 8-(2х-3)
2) 1-(5-3х)
3) 7-(4+2х-9)
4) 11-(х+2)
5) –х-2+(х-3)
6) (7х-2)-3х
7) -9-(8-9х)
8) 9-(-4х+7)
9) –(х-7)+3
10)(-5х+3)-(-х+6).
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