Решите уравнения : 1) 7 * ( х + 8 ) - 25 = 66 2) 9 * ( 5х +13 ) = 252 3) 15 * ( 13х - 7 ) = 285 4) ( у + 46 ) / 3 = 18 5) ( 2х + 39 ) / 5 = 13 6) 182 / ( х - 15 ) = 14

1) 7 * ( х + 8 ) - 25 = 66 7x+56-25=66 7x+31=66 7x=66-31 7x=35 x=35:7 x=5 ------------------------- 2) 9 * ( 5х +13 ) = 252 45x+117=252 45x=252-117 45x=135 x=135:45 x=3 ---------------------------- 3) 15 * ( 13х - 7 ) = 285 195x-105=285 195x=285+105 195x=390 x=390:195 x=2 ------------------- 4) ( у + 46 ) / 3 = 18 y+46=18*3 y+46=54 y=54-46 y=8 ---------------- 5) ( 2х + 39 ) / 5 = 13 2x+39=13*5 2x+39=65 2x=65-39 2x=26 x=26:2 x=13 ---------- 6) 182 / ( х - 15 ) = 14 x-15=182:14 x-15=13 x=13+15 x=28 =======================