a) x+5=20-4x

x+4x=20-5

5x=15

x=

[tex] \frac{15}{5} [/tex]

x=3

b)9x-4x+10=30

5x+10=30

5x=30-10

5x=20

x=

[tex] \frac{20}{5} [/tex]

x=4

c)9x=6x+12

9x-6x=12

3x=12

x=

[tex] \frac{12}{3} [/tex]

x=4

d)5x-1=3x+11

5x-3x=11+1

2x=12

x=

[tex] \frac{12}{2} [/tex]

x=6

e)2x+8=x+13

2x-x=13-8

x=5

g)5y+2=8y

5y-8y= -2

-3y= -2

y=

[tex] \frac{2}{3} [/tex]

h)4x-2=3x+4

4x-3x=4+2

x=6

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