2x + 1/3 - 5x - 2/4 = 0
Упростим выражение: 2x - 5x + 1/3 - 1/2 = 0
-3x - 1/6 = 0
-3x = 1/6
x = -1/18

$a-3$2 - $2-a$2
$a-3$2 = a^2 - 6a + 9
$2-a$2 = 4 - 4a + a^2
Разность: a^2 - 6a + 9 - $4-4a+a^2$ = a^2 - 6a + 9 - 4 + 4a - a^2 = -2a + 5

3x + 4 > 2x + 5
3x - 2x > 5 - 4
x > 1

sin$52$ - sin$8$ = sin$180-52$ - sin$8$ = sin$128$ - sin$8$

2x - 1 = -x + 3
3x = 4
x = 4/3

2x^2 + 3 = 11
2x^2 = 8
x^2 = 4
x = ±2

3x + 0.4x^2 = 0
0.4x^2 + 3x = 0
x$0.4x+3$ = 0
x = 0 или x = -7.5