Răspuns :
3x=21=>x=7
5x=15=>x=3
5x=15=>x=3
4x=24=>x=6
x:12=5=>x=60
144:x=6=>x=26
x:6=7=>x=42
36:x=18=>x=2
5x=15=>x=3
5x=15=>x=3
4x=24=>x=6
x:12=5=>x=60
144:x=6=>x=26
x:6=7=>x=42
36:x=18=>x=2
3x+2=23 17+5x=32 5x-9=26 37-4x=13 x:12+8=13 144:x+9=15
3x=23-2 5x=32-17 5x=26+9 4x=37-13 x:12=13-8 144:x=15-9
3x=21 5x=15 5x=35 4x=24 x:12=5 144:x=6
x=21:3 x=15:5 x=35:5 x=24:4 x=5*12 x=144:6
x=7 x=3 x=7 x=6 x=60 x=24
43+x:6=50 59-36:x=41
x:6=50-43 36:x=59-41
x:6=13 36:x=18
x=13*6 x=36:18
x=78 x=2
3x=23-2 5x=32-17 5x=26+9 4x=37-13 x:12=13-8 144:x=15-9
3x=21 5x=15 5x=35 4x=24 x:12=5 144:x=6
x=21:3 x=15:5 x=35:5 x=24:4 x=5*12 x=144:6
x=7 x=3 x=7 x=6 x=60 x=24
43+x:6=50 59-36:x=41
x:6=50-43 36:x=59-41
x:6=13 36:x=18
x=13*6 x=36:18
x=78 x=2