1. 2х+1+3(х-2)=14
2х+1+3х-6=14
2х+3х=14-1+6
5х=19
х=19:5
х=3,8
2. -9(2х-7)+17(х-1)=0
-18х+63+17х-17=0
-18х+17х=0-63
-1х=-63
х=63
3. -7(2х-3)+5(3х-2)=0
-14х+21+15х-10=0
-х=-21
х=21
4. 5(x+4)= 9-12
5х+20=-3
5х=-3-20
5х=-23
х=4,6
5. (8-514 – 3x)=18
-506-3х=18
-3х=18+506
-3х=524
х=524/3
х=174 2/3
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Answers & Comments
1. 2х+1+3(х-2)=14
2х+1+3х-6=14
2х+3х=14-1+6
5х=19
х=19:5
х=3,8
2. -9(2х-7)+17(х-1)=0
-18х+63+17х-17=0
-18х+17х=0-63
-1х=-63
х=63
3. -7(2х-3)+5(3х-2)=0
-14х+21+15х-10=0
-х=-21
х=21
4. 5(x+4)= 9-12
5х+20=-3
5х=-3-20
5х=-23
х=4,6
5. (8-514 – 3x)=18
-506-3х=18
-3х=18+506
-3х=524
х=524/3
х=174 2/3