Question

помогите решить а, з и в

Answer 1

a) 2*28 = 7*(x+2) 56 = 7*x + 14 7*x = 42 x = 6 в) 30*3 = 10*(x-3) 90 = 10*x - 30 10*x = 120 x = 12 з) 18*x = 12*39/13 18*x = 12*3 18*x = 36 x = 2