8.x=5是下面方程( )的解.
A. | 2(x-1)=10 | B. | 17-2x=7 | C. | 4x+3=48 | D. | 2x-x=10 |
5.解方程.
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3x-29=19 | 3×2-6x=4.2 | 7.4x-8-x=0 | 5x+2=4(x+8) |