Select the tables that show a proportional relationship between x and
1 answer:
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Answer:
Step-by-step explanation:
We want to find the value of x that satisfies both
- 9x + 4y = 8
and
-3x-y= 4
given the same value of y.
This is the x-value of the point of intersection of the graph of the two lines.
We make y the subject of the bottom equation to get:
y=-3x-4
We substitute y=-3x-4 into the top equation to get:
-9x+4(-3x-4)=8
Expand to get:
-9x-12x-16=8
Group like terms
-21x=24