(2)4x-3(20-x)= 3 & gt； & gt4x-60+3x = 3 & gt； & gt7x=63 >& gtx=9
6(x-3)= 2x+2 & gt； & gt6x- 18 = 2x+2 & gt； & gt6x-2x = 2+ 18 & gt； & gt4x = 20 & gt& gtx=5
(4) 3-2 (x+1) = 2 (x-3) >>3-2x-2 = 2x-6 > & gt4x = 7>>x = seven quarters.
(5)x-3(20-x)=3x-7(9-x)>& gtx-60+3x = 3x-63+7x & gt； & gt6x = 3 & gt& gtx=0.5
(6)3(2x+5)= 2(4x+3)+ 1 & gt； & gt6x+ 15 = 8x+6+ 1 & gt； & gt2x = 8 & gt& gtx=4
(7)(x+ 1)-2(x- 1)= 1-3x & gt； & gtx+ 1-2x+2 = 1-3x & gt； & gt2x =-2 & gt； & gtx=- 1
(8)2(5-2x)=-3(x- three quarters) >10-4x =-3x+9/4 > > X= three quarters eleven
9. It is known that x=-2 is the solution of equation 2(x-m)=8x-4m about x..
So twice (-2-m) = eight times (-2)-4m > > -4-2m =- 16-4m & gt； & gt2m =- 12 & gt； & gtm=-6
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It's already very detailed ~! Do you need any more details? Haha's laughter ...