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x+7=0
x=-7
b)4x-3/7+2x=0/ (7+2x)
4x-3=0
4x=3
x=3/4
c)7x/x-3=5 / (x-3)
7x=5
x=5/7
d)6x+1/5x-4=-3 / (5x-4)
6x+1=-3(5x-4)
6x+1=-15x+12
6x+15x=12-1
21x=11
x=11/21
e)9+x/2x+5 +6=0 / (2x+5)
9+x+6(2x+5)=0
9+x+12x+30=0
x+12x=-30-9
13x=-39
x=-3
f)3- 3x-7/4-5x=0/(4-5x)
3(4-5x)-(3x-7)=0
12-15x-3x+7=0
-15x-3x=-12-7
-18x=-19
x=19/18
g)3/4=4x-11/6x+2 / 4(6x+2)
3(6x+2)=4(4x-11)
18x+6=16x-44
18x-16x=-44-6
2x=-50
x=-25
h)-3x-2/4-5x - 2/7=0 / 7(4-5x)
7(-3x-2)-2(4-5x)=0
-21x-14-8+10x=0
-21x+10x=14+8
-11x=22
x=-2
i) 6x-5/2-7x+4/5=0/ 5(2-7x)
5(6x-5)+4(2-7x)=0
30x-25+8-28x=0
30x-28x=25-8
2x=17
x=17/2=8 1/2