$2^{n}$ =8
simplify 7wx to the power of 2 x 3w to the power of 3 x
5x+3y=5y+x
3630/0.40
18/2*19/3 of 4.3/{13/2+57/8 of 4.28}
6a+16b=48000
12a+6b=42000
np5=np6
the cost of 2 stry books and 7 magazines is 55
the cost of 5 story books and 3 magazines is 65
using x to represent the cost in ...
2+3
