A.由7+x=13,得到x=13+7 | ||
B.由5x=4x+8,得到5x-4x=8 | ||
C.由
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D.由9x=-4,得到x=2 |
x |
2 |
4 |
9 |
A.x=y | B.ax+1=ay-1 | C.ax=-ay | D.3-ax=3-ay |
A.若x-1=3,则x=4 | B.若
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C.若x-3=y-3,则x-y=0 | D.若3x+4=2x,则3x-2x=-4 |
A.x-5=y-5 | B.-
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C.
| D.
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2 |
3 |
A.(1)(2) | B.(1)(2)(3)(4) | C.(1)(3) | D.(1)(2)(3) |
A.若a=b,则a-3=b-3 | B.若a=b,则
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C.若ax=bx,则a=b | D.若x=2,则x2=2x |
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