#351.
д) 4 + 25y = 6 + 24y
25y - 24y = 6 - 4
y = 2
e) 11 - 5x = 12 - 6x
-5x + 6x = 12 - 11
x = 1
#352.
a) 5x +3 = 2x
5x - 2x = -3
3x = -3
x = -3/3 = -1
б) -0.4a - 14 = 0.3a
-14 = 0.3a + 0.4a
0.7a = -14
a = -14/0.7 = -20
в) 8x - 25 = 3x + 30
8x - 3x = 30 + 25
5x = 55
x = 55/5 = 11