A.x(1-10%)=270-x | B.x(1+10%)=270 |
C.x(1+10%)=x-270 | D.x(1-10%)=270 |
A.48-x=44-x | B.48-x=44+x | C.48-x=2(44-x) | D.以上都不对 |
A.1 | B. | C.2 | D. |
A.2-2(2x-4)=-(x-7) | B.12-2(2x-4)=-x-7 |
C.12-4x-8=-(x-7) | D.12-2(2x-4)=x-7 |
A.3x-2x+2=-1 | B.3x-2x+3=-3 | C.2(x-5)=1 | D.x-3=0 |
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