Answer:
12 t shirts that not blur nor black
Step-by-step explanation:
30-20%=24 divided by 2=12
30/2=15 black
30/100*20= 6 blue
15+6= 21
30-21=9
9 were neither black or blue
the number is 4 or -16
hope it help u!!
50 +25
B=45
let the supplamentary angle of <A is <d
180-A=d
180-135=d
45=d
90+d+B=180
90+45+B=180
135+B=180
B=180-135