0.66 Найдите корень уравнения: a) (x + 15) – 8 = 17; в) (45 – у) + 18 = 58; б) (24 + x) - 21 = 10; г) (у – 35) + 12 = 32.

a) $$(x + 15) – 8 = 17$$ $$x + 15 = 17 + 8$$ $$x + 15 = 25$$ $$x = 25 - 15$$ $$x = 10$$ б) $$(24 + x) - 21 = 10$$ $$24 + x = 10 + 21$$ $$24 + x = 31$$ $$x = 31 - 24$$ $$x = 7$$ в) $$(45 – у) + 18 = 58$$ $$45 - y = 58 - 18$$ $$45 - y = 40$$ $$y = 45 - 40$$ $$y = 5$$ г) $$(у – 35) + 12 = 32$$ $$y - 35 = 32 - 12$$ $$y - 35 = 20$$ $$y = 20 + 35$$ $$y = 55$$