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Phantasy [73]
3 years ago
5

5p-3r=1

Mathematics
2 answers:
melomori [17]3 years ago
6 0
To answer, multiply the first equation by 2. Then, add the equations,
                                10p - 6r = 2
                         +       8p + 6r = 4
The resulting sum would be 18p = 6. The value of p from the equation is p = 1/3. Substitute this value to either of the equation,
                                 10(1/3) - 6r = 2    ; r = 2/9
Thus, the answer is letter C. 
Brilliant_brown [7]3 years ago
4 0
If you would like to solve the system of equations, you can do this using the following steps:

5p - 3r = 1     /*2
8p + 6r = 4
__________
10p - 6r = 2
<span>8p + 6r = 4
</span>__________
10p - 6r + 8p + 6r = 2 + 4
18p = 6
p = 6/18
p = 1/3

<span>5p - 3r = 1
</span>5 * 1/3 - 3r = 1
5/3 - 3r = 1
5/3 - 1 = 3r
5/3 - 3/3 = 3r
2/3 = 3r
r = 2/9

(p, r) = (1/3, 2/9)

The correct result would be <span>(1/3, 2/9)</span>.
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