Question

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Answer 1

Răspuns:

a)4x+1=9

4x=9-1

4x=8

x=8÷4

x=2

s={2}

b)3x-1=8

3x=8+1

3x=9

x=3

s={3}

c)2x+9=3

2x=3-9

2x=-6

x=-3

s={-3}

d)5x-3=-23

5x=-23+3

5x=-20

x=-4

s={-4}

a)3-2x=7

2x=7+3

2x=10

x=5

s={5}

b)-3x+1=10

-3x=10-1

-3x=9

x=-3

s={-3}

c)3-4x=-21

-4x=-21-3

-4x=-24

x=6

s={6}

d)-7-2x=-9

-2x=-9+7

-2x=-2

x=1

s={1}

a)3x+4=2x+10

3x-2x=10-4

x=6

s={6}

b)6x-1=2x+11

6x-2x=11+1

4x=12

x=3

s={3}

c)9x+1=2x-20

9x-2x=-20-1

7x=-21

x=-3

s={-3}

d)7x-3=3x-27

7x-3x=-27+3

4x=-24

x=-6

s={-6}