<span>a+b=5,
0.1*a+0.25*b=0.2*5
a=5-b
0.1*(5-b)+0.25*b=1
0.5-0.1b+0.25*b=1
0.15*b=0.5
b=3.33333333
a=5-b
a=1.66666667 b=3.33333333</span>
open the parenthes. and then after that you'll get 27+12x-15. if you simplify that then you'll get 12x+12
2 x 3.99 = 7.98
3 x 4.49 = 13.47
1 x 4.99 = 4.99
Total: 26.44
50.00 - 26.44 = 23.56
Answer: it would be 13
Step-by-step explanation:
