Реши уравнение номер9
1. (5•а-25):4 = 29 -4• 6 5a-25 :4 = 5 5a -25 = 20 5a = 20+25 5a= 45 a= 45:5 a= 9 ———————- 2. 39 + a • (42 : 7) - ( 19 + 18) = 26 39 + a • 6 -37 = 26 39 + 6a -37 = 26 2 + 6a = 26 6a = 26-2 6a = 24 a= 24:6 a = 4 ————————-