а) 8(3-3b) + 5(3b+5) = 7
24 - 24b + 15b + 25 = 7
-9b + 49 = 7
-9b = 7 - 49
-9b = -42
b = -42 / -9
b = 4.67
б) -6(3t+4) + 4(2t-2) = 7
-18t - 24 + 8t - 8 = 7
-10t - 32 = 7
-10t = 7 + 32
-10t = 39
t = 39 / -10
t = -3.9
а) 8(3-3b) + 5(3b+5) = 7
24 - 24b + 15b + 25 = 7
-9b + 49 = 7
-9b = 7 - 49
-9b = -42
b = -42 / -9
b = 4.67
б) -6(3t+4) + 4(2t-2) = 7
-18t - 24 + 8t - 8 = 7
-10t - 32 = 7
-10t = 7 + 32
-10t = 39
t = 39 / -10
t = -3.9