1) 4(x-6)=x-9; 4х-24=х-9; 3х=15; х=5
4) 3,5-x=8(x+2,8); 3,5-х=8х+22,4; -9х=18,9; х=-2,1
2) 6-3(x+1)=7-2x; 6-3х-3=7-2х; -х=4; х=-4
5) 0,3 (6-2y)=4,5-0,7 (y+9); 1,8-0,6у=4,5-0,7у-6,3; 0,1у=-3,6; у=-36
3) (8x+3)-(10x+6)=9; 8х+3-10х-6=9; -2х=12; х=-6
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Answers & Comments
1) 4(x-6)=x-9; 4х-24=х-9; 3х=15; х=5
4) 3,5-x=8(x+2,8); 3,5-х=8х+22,4; -9х=18,9; х=-2,1
2) 6-3(x+1)=7-2x; 6-3х-3=7-2х; -х=4; х=-4
5) 0,3 (6-2y)=4,5-0,7 (y+9); 1,8-0,6у=4,5-0,7у-6,3; 0,1у=-3,6; у=-36
3) (8x+3)-(10x+6)=9; 8х+3-10х-6=9; -2х=12; х=-6