Answer:
16 students
Step-by-step explanation:
Knowing that 4 is 20% of a certain number is a great start. Think, how many times does 20 go into 100, 4. So then you multiply 4 with 4.
4 · 4 = 16
I see you want to solve -2x + y + 6 = 0 2x + y - 8 = 0 simultaneously. Next time, please put each equation on its own line, like this:
-2x + y + 6 = 0
2x + y - 8 = 0
or separate the two equations with "and" or some other symbol.
We can easily eliminate x by adding these 2 equations together:
-2x + y + 6 = 0
2x + y - 8 = 0
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2y - 2 = 0, which yields y = 1. This is the equation called for in this problem. You were not asked to find x.
I think the answer to ur question is -3/5
