Odpowiedź :
a)
[tex]2x+1 = 3x-6\\\\2x-3x = -6-1\\\\-x = -7 \ \ /:(-1)\\\\\boxed{x = 7}[/tex]
b)
[tex]3(x+2) = 5x-7\\\\3x+6 = 5x - 7\\\\3x-5x = -7-6\\\\-2x= -13 \ \ /:(-2)\\\\\boxed{x = 6\frac{1}{2}}[/tex]
2x + 1 = 3x - 6
2x - 3x = - 6 - 1
-x = -7
x = 7
3(x+2) = 5x - 7
3x + 6 = 5x - 7
3x - 5x = -7 - 6
-2x = -13 /:2
-x = -6,5
x = 6,5
2x - 3x = - 6 - 1
-x = -7
x = 7
3(x+2) = 5x - 7
3x + 6 = 5x - 7
3x - 5x = -7 - 6
-2x = -13 /:2
-x = -6,5
x = 6,5