Answer:
these are simple calculations
It is simply added such as:
x values added/subtract into x values
y values added/subtract into y values
s values added/subtract into s values
a values added/subtract into a values
b values added/subtract into b values
Answer are following :
1) 13x
2) 11x+5y+5
3)7s+2d+11
4)3b+9n-8
5)-6a+5b+15ab
6)6x+4y
7)2x+24y
8)5t+10
9)7x+6y+6
10)12s+3st+8
11) 7t+14
12)6x+7
