72:b:4x5x6=60
72:b:4x5=60:6
72:b:4x5=10
72:b:4=10:5.
72:b:4=2
72:b=2x4
72:b=8
b=72:8
b=9
8÷b×1×7=28 8÷b×1=28÷7
8÷b×1=4 8÷b=4×1
8÷b=4 b=8÷4
b=2
8÷2×1×7=4×1×7=4×7=28
Ma bucur ca te pot ajuta ! Spor la teme!
