If -3q + 4 = 13 then 3q = -9 : q = -3
If 6q = 13 then q = 13/6 = 2 1/6
The question contains an anomaly and is invalid.
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3q = 18 q = 6
3q + 5 + 2q + 5 = 65 5q + 10 = 65 5q = 55 q = 11 Check it. 33 + 5 + 22 + 5 = 65 It checks.
2p + 3q = 13, 5p - 4q = -2 Multiply the first equation by 4 and the second by 3 and add them, which gets rid of the q: 8p + 15p = 52 - 6, and 23p = 46, so p=2. Plug that into the first equation to find q: 4 + 3q = 13, so q=3. Test your answers in the second equation to be sure: 5(2) - 4(3) = 10-12 = -2. It checks. So p=2, q=3.
6p + 11q + 4
9q2 is the square of 3q - so 3q is the result of dividing 9q2 by 3q.