Lg(2x)+lg(x+3)=lg(12x-4)
2lgx+lgx+3lg=12lgx-4lg
6lgx=12lgx-4lg
6lgx-12lgx=4lg
-6lgx=4lg
2lg(-3x+2)
4 5/6 - 2 23/24 = 4 20/24 - 2 23/24 = 1 21/24 = 1 7/8
7 - 2 16/12 = 7 - 3 4/12 = 3 8/12 = 3 2/3
2 1/7*3 8/15+1 7/15*2 2/7-7 2/7*5=
2 2/7*3 8/15=848/105=8 8/105
1 7/15*2 2/7=352/105=3 37/105
7 2/7*5=255/7=36 3/7
8 8/105+3 37/105=11 3/7
11 3/7-36 3/7=-25