1) (3x-1)(5x+4)-15x2=17
15x2+12x-5x-4-15x2=17
7x-4=17
7x=21
x=3
2) 5-1-2x/4=3x+20/6+x/3
60-3(1-2x)=2(3x+20)+4x
60-3+6x=6x+40+4x
60-3=40+4x
57=40+4x
-4x=40-57
-4x=-17
x=4,25
1) (3x-1)(5x+4)-15x2=17
15x2+12x-5x-4-15x2=17
7x-4=17
7x=21
x=3
2) 5-1-2x/4=3x+20/6+x/3
60-3(1-2x)=2(3x+20)+4x
60-3+6x=6x+40+4x
60-3=40+4x
57=40+4x
-4x=40-57
-4x=-17
x=4,25