5-X=12
(-X)=12-5
(-X)=7
X=-7
-5X=14
-5X÷5=14÷5
(-X)=2,8
X=-2,8
13-3X=-25
-3X=-25-13
-3X=-38
-3X÷-3=-38÷-3
X=-38/3
13X+13=1-13
13X+13=-12
13X=-12-13
13X=-25
13X÷13=-25÷13
X=-25/13
8X-4=60
8X=60+4
8X=64
8X÷8=64÷8
X=8
2X+24=60
2X=60-24
2X=36
2X÷2=36÷2
X=18
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5-X=12
(-X)=12-5
(-X)=7
X=-7
-5X=14
-5X÷5=14÷5
(-X)=2,8
X=-2,8
13-3X=-25
-3X=-25-13
-3X=-38
-3X÷-3=-38÷-3
X=-38/3
13X+13=1-13
13X+13=-12
13X=-12-13
13X=-25
13X÷13=-25÷13
X=-25/13
8X-4=60
8X=60+4
8X=64
8X÷8=64÷8
X=8
2X+24=60
2X=60-24
2X=36
2X÷2=36÷2
X=18