3r+p=-8 and 2r + p = 22 2r+p=22

2 answers:

7 0

(3r+p=-8) + (2r + p = 22)
Multiply second equation by -1
(3r+p=-8) + (-2r - p = -22)
Subtract 2r from 3r while subtracting p from p and -8 from -22
Final Answer: r= -30

3r+p=-8
Subsititue -30 for r
3(-30)+p=-8
Multiply -30 by 3
-90+p=-8
Add 90 to both sides
Final Answer: p=82

And so the point of intersection on the graph would be (-30,82)

babunello [35]4 years ago

7 0

We can eliminate p
multiply 2nd equation by -1 and add to first

3r+p=-8
-2r-p=-22 +
1r+0p=-30

r=-30
sub back

2r+p=22
2(-30)+p=22
-60+p=22
add 60 both sides
p=82

r=-30
p=82

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