1) 3x+2=0
3x=-2
x=-2/3
2) 3-5x=0
5x=3
x=3/5=0.6
3) 0.6x+1.8=0
0.6x=-1.8
x=-3
4) 7-0.7x=0
0.7x=7
x=10
5) 8x-5=x-40
7x=-35
x=-5
6) 7t+21=t-3
6t=-24
t=-4
7) 9+13y=35+26y
13y=-26
y=-2
8) 0.3p-5=6-0.7p
p=11
9) 8.31k-71=1.11k+1
7.2k=72
k=10
10) 9c+2.65=36.85-9c
18c=34.2
c=1.9
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Answers & Comments
1) 3x+2=0
3x=-2
x=-2/3
2) 3-5x=0
5x=3
x=3/5=0.6
3) 0.6x+1.8=0
0.6x=-1.8
x=-3
4) 7-0.7x=0
0.7x=7
x=10
5) 8x-5=x-40
7x=-35
x=-5
6) 7t+21=t-3
6t=-24
t=-4
7) 9+13y=35+26y
13y=-26
y=-2
8) 0.3p-5=6-0.7p
p=11
9) 8.31k-71=1.11k+1
7.2k=72
k=10
10) 9c+2.65=36.85-9c
18c=34.2
c=1.9