Answer:
q in (-oo:+oo)
q/(-7) = 6 // - 6
q/(-7)-6 = 0
-1/7*q-6 = 0 // + 6
-1/7*q = 6 // : -1/7
q = 6/(-1/7)
q = -42
Hope I was helpful! :)
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