Answer:
a = 10
Step-by-step explanation:
From the solution given, x = a and y = -1
Substitute for x and y in either of the equations
y = -x + 9
-1 = -a + 9
a = 9 + 1 = 10
Numerical methods; Rearrange your equation; Find the negative root of fact equation. Then you have your answer.
Yes. They both mean the same thing.
The first one I believe is five because it says ten times as many as ___________ is fifty so you take five times ten you get fifty.