а)x-8=12
x=12+8
х=20
б)4(x+5)=200
4x + 20 = 200
4x = 200 – 20
4x = 180
x = 45
в)4x+20=200
4x=200-20
4x=180
x=180/4
х=45
а)x-8=12
x=12+8
х=20
б)4(x+5)=200
4x + 20 = 200
4x = 200 – 20
4x = 180
x = 45
в)4x+20=200
4x=200-20
4x=180
x=180/4
х=45