解:?$8x+4=-20$? ?$8x=-24$? ?$x=-3$?
解:?$4x+10-2x=6$? ?$2x=-4$? ?$x=-2$?
解:?$4x-6=15-3x$? ?$7x=21$? ?$x=3$?
解:?$2+x=-5x+5$? ?$6x=3$? ?$x=\frac 12$?
解:?$3x-2=8x-12$? ?$-5x=-10$? ?$x=2$?
解:?$2x-2-5=7x$? ?$-5x=7$? ?$x=-\frac {7}{5}$?
解:?$5x+2=3x+6$? ?$2x=4$? ?$x=2$?
解:?$5+5x=2x-4$? ?$3x=-9$? ?$x=-3$?
解:?$3-x-2=5x+5$? ?$-6x=4$? ?$x=-\frac 23$?
解:?$2x-2-2=4x$? ?$-2x=4$? ?$x=-2$?
解:?$4-6+3x=5x$? ?$-2x=2$? ?$x=-1$?
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