A) -5(9x-5x-x)=-15
9x-6x=3
3x=3
X=1
B) 6x-4=5x+10
6x-5x=10+14
X=24
C) 1.5 +x =4x-9
X-4x=-9-1.5
-3x=-10.5
X=3.5
D)5x+8=4x+7
5x-4x=7-8
X=-1
E)2.1+x=5.7-3x
X+3x=5.7-2.1
4x=3.6
X=0.9
F)6.3-3.6x=-2.9x
-3.6x+2.9x=-6.3
-0.7x=-6.3
X=9
G)-3(x+9)=4x+28
-3x-27=4x+28
-3x-4x=28+27
-7x=55
H)5.4+1.9a=0.7a
5.4=0.7a-1.9a
5.4=-1.2a
A=-4.5