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Multiplicamos toda la igualdad por 2:
(x-5) = -4x +14
x-5 = -4x +14
x +4x = 14+5
5x = 19
x= 19/5
Ahora para comprobar:
(19/5 -5 ) /2 = -2 × (19/5) +7
(-6/5) / 2 = -38/5 +7
-6/10 = -3/5
-3/5 = -3/5 ✔✔✔