1 28b×4 =211b
2 15k÷3=(15/3)k=5k
3 6×8m÷12=48m/12=4m
4 9x÷3=3x
5 75x÷15+9x-8=5x+9x+8=14x+8
6 4m×7-63n÷9-3n=28m-7n-3n=28m-10n
7 7-15x-6-2x=(7-6)-(15x+2x)=1-17x
1 28b×4 =211b
2 15k÷3=(15/3)k=5k
3 6×8m÷12=48m/12=4m
4 9x÷3=3x
5 75x÷15+9x-8=5x+9x+8=14x+8
6 4m×7-63n÷9-3n=28m-7n-3n=28m-10n
7 7-15x-6-2x=(7-6)-(15x+2x)=1-17x