Question

algebra

a) 5a+3=3a+8

b)5(3a-2)=3(2a+3)

c)4(2a-2)=4

d)81x+25=125+x

e) 1/2(x+2)+1/2(x+3)+1/6(x+6)=0

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Answer 1

a)5a-3a=8-3

2a=5|:2

a=2,5

c)4(2a-2)=4

8a-8=4

8a=4+8

8a=12|8

a=1,5

d)81x+25=125+x

81x-x=125-25

80x=100|80

x=1,25

 

Answer 2

a)5a-3a=8-3

2a=5|:2

a=2,5

b)15a-10=6a+9

15a-6a=19

9a=19 /:9

a=2,(1)

c)4(2a-2)=4

8a-8=4

8a=4+8

8a=12|8

a=1,5

d)81x+25=125+x

81x-x=125-25

80x=100|80

x=1,25

e) 1/2x +1+1/2x+3/2+1/6x+1=0

1i1/6x=-2-3/2

7/6x=-3/2 /:7/6

x=-9/7

x=1i2/7