Question

vă rog , ex 6 ,❤ dau coroană ​

Answer 1

Răspuns:

a)2x+5=9

2x=9-5

2x=4

x=4÷2

x=2

b)3-5x=18

-5x=18-3

-5x=15

x=15÷(-5)

x=-3

c)-7=8+2x

2x=-7-8

2x=-15

x=-15÷2

d)-6x+12=0

-6x=-12

x=-12÷(-6)

x=2

e)2(x+3)-5=7

2x+6-5=7

2x+1=7

2x=7-1

2x=6

x=6÷2

x=3

f)8-3(x-4)=2

8-3x+12=2

20-3x=2

-3x=2-20

x=-18÷(-3)

x=6

g)4(x+1)-3(x-2)=9

4x+4-3x+6=9

x+10=9

x=9-10

x=-1

h)2x+3=x+7

2x-x=7-3

x=4

i)3x-2=4x-5

3x-4x=-5+2

-x=-3

x=3

j)6x+3=4x-1

6x-4x=-1-3

2x=-4

x=-2

k)3x-5=7x+11

3x-7x=11+5

-4x=16

x=-4

l)5x-4=3x-4

5x-3x=-4+4

2x=0

x=0÷2

x=0

m)7x-3x=4x+1

4x-4x=1(acesta nu are soluție?