9+4х=40
4х=40-9
4х=31
х=31:4
х=7,75
8(х+3)=40
8х+24=40
8х=40-24
8х=16
х=2
9+4x=40
4x=40-9
4x=31
x=31:4
x=7.75
9+(4*7.75)=40
40=40
8(x+3)=40
8x+24=40
8x=40-24
8x=16
x=16:8
x=2
8(2+3)=40
9+4х=40
4х=40-9
4х=31
х=31:4
х=7,75
8(х+3)=40
8х+24=40
8х=40-24
8х=16
х=2
9+4x=40
4x=40-9
4x=31
x=31:4
x=7.75
9+(4*7.75)=40
40=40
8(x+3)=40
8x+24=40
8x=40-24
8x=16
x=16:8
x=2
8(2+3)=40
40=40