?$解: -3(x-1)=9$? ?$兩邊同時除以-3 ,得x-1=-3$? ?$兩邊同時減去1 ,得x=-2$
?$ 解:2x-x-10=5x+2x-2$? ?$ x-10=7x-2$? ?$ 6x=-8$? ?$ x=-\frac{4}{3}$?
?$ 解:3x-7x+7=3-2x-6$? ?$ 3x+2x-7x=-3-7$? ?$ -2x=-10$? ?$ x=5$?
?$解：去括號,得3x-2x+7=-1$? ?$移項,得3x-2x=-1-7$? ?$合并同類項,得x=-8$? ?$ $?
?$解：去括號,得7x-2x+2=-3$? ?$移項,得7x-2x=-3-2$? ?$合并同類項,得5x=-5$? ?$系數(shù)化為1 ,得x=-1$? ?$ $?
?$解：去括號，得6-2y-2y-3=1$? ?$移項,得-2y-2y=1-6+3$? ?$合并同類項,得-4y=-2$? ?$系數(shù)化為1 ,得y=\ \frac{1}2$? ?$ $?
?$解：去括號,得6x+9-2x+1=-2$? ?$移項,得6x-2x=-2-9-1$? ?$合并同類項,得4x=-12$? ?$系數(shù)化為1 ,得x=-3\ $?
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