7a)
x - 10 + x - 11 + 3x + 6 = 180
5x -15 = 180
5x = 195
x = 39
7b)
y = 3x + 6
y = 3(39) +6
y = 117 + 6
y = 123
Answer:
the last one -) -7
Step-by-step explanation:
if this help you please give me a crown please
(So “/” will basically mean divide)
450/3000=0.15
0.15*100=15% rate