1.) (x+2)/5=(3x-5)/4 |*20
4*(x+2)=5*(3x-5)
4x+8=15x-25
-11x=-33
x=3
2.) (6x+7)/7-3= (5x-3)/8 |*56
8*(6x+7)-168= 7*(5x-3)
48x+56-168= 35x-21
13x = 91
x = 7
3.) (3-x)/12 = (-x+6)/8 |*96
8*(3-x) = 12*(-x+6)
24-8x = -12x+72
4x = 48
x = 12
1.) (x+2)/5=(3x-5)/4 |*20
4*(x+2)=5*(3x-5)
4x+8=15x-25
-11x=-33
x=3
2.) (6x+7)/7-3= (5x-3)/8 |*56
8*(6x+7)-168= 7*(5x-3)
48x+56-168= 35x-21
13x = 91
x = 7
3.) (3-x)/12 = (-x+6)/8 |*96
8*(3-x) = 12*(-x+6)
24-8x = -12x+72
4x = 48
x = 12