Answer:
Part A:80
Part B:4
Step-by-step explanation:
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Hope it helps, good luck
You would plug in the y=9 into the first equation and then have the expression 9=9x-9
. After going through the first steps of solving an expression you would get 18=9x. X=2. Then you would plug in the x value into the first expression to get y=9.
Your subtracting 3x from 5x: 5x-3x
This is so you only have a variable on one side