Question

știind că x este număr natural află :​

Answer 1

a) 2x+3x=15

5x=15

x=15 : 5

x=3

S={3}

b)8x–5x=18

3x=18

x=18 : 3

x=6

S={6}

c)5x–4x=2

x=2

S={2}

d)x+2x=24

3x=24

x=24 : 3

x=8

S={8}

e)7x–6x=30

x=30

S={30}

f)x+x=6

2x=6

x=6 : 2

x=3

S={3}

g)8x–7x=3

x=3

S={3}

h)2x–x=5

x=5

S={5}