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Use the substitution method to solve the linear system.

1/8p+3/4q=7
3/2p-q=4

Thanks.

1 answer

1st times 8 ----> p + 6q = 56 or p = 56-6q

2nd times 2 ---> 3p - 2q = 8

3(56-6q) - 2q = 8
168 - 18q - 2q = 8
-20q = -160
q = 8

then p = 56-6(8) = 8

p= 8 and q = 8

Notice how for both of your last two posts, I got rid of fractions to make the equations much more manageable.
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