2(3x-1)(2x+5)-6(2x-1)(x+2)=48
(6x-2)(2x+5)-(12x-6)(x+2)=48
12x²+26x-10-12x²-18x+12=48
8x+2=48
8x=48-2
8x=46
x=46:8
x=5,75
2(3x-1)(2x+5)-6(2x-1)(x+2)=48
(6x-2)(2x+5)-(12x-6)(x+2)=48
12x²+26x-10-12x²-18x+12=48
8x+2=48
8x=48-2
8x=46
x=46:8
x=5,75