Question

ma ajutați va rog cu niște ecuatii:a) 3x+15=-x+3b)5-3x=x-7c)3(x-2)=5(x-4)d)3x-6=x+8e)2x-5=6x+15f)5(10x+4)=5(8x-3)g)5(x+1)-3(x-3)=-20​

Answer 1

Răspuns:

Explicație pas cu pas:

a) 3x+15=-x+3

4x= -12

x= -3

b) 5-3x=x-7

4x=12

x=3

c) 3(x-2)=5(x-4)

3x-6=5x-20

2x=14

x=7

d)3x-6=x+8

2x=14

x=7

e)2x-5=6x+15

4x= -20

x= -5

f)5(10x+4)=5(8x-3)

50x +20=40x-15

10x = -35

x= -35/10 = -3,5

g)5(x+1)-3(x-3)=-20​

5x +5 -3x +9 = -20

2x =  -20-5-9

2x= -34

x= -17

succes !