Решите уравнение: a) 210-x=-210 б) 210*x=30 в) 210+x=-90 г)210:x=-3
210 - X = - 210 X = 210 + 210 X = 420 ------------------ 210 * X = 30 X = 30 : 210 X = 30/210 = 3/21 = 1/7 -------------------- 210 + X = - 90 X = - 90 - 210 X = - 300 ---------------------- 210 : X = - 3 X = 210 : ( - 3 ) X = - 70
А) -х = -210-210 -х = -420 х = 420 б) х = 30/210= 1/7 в)х = -90-210 х = -300 г)х = 210:(-3) = -70