Question

Efectuati :
1. 5(x-7)-2x = x - 41
2. 7(x-9)- 4x= x-39
3. 4(x + 5 ) - 3(x-3) = 2(x+ 15)
4. 5(x + 2 ) - 4(x -2 ) = 3(x + 8 )
5. 2[15 + 3( x-1)] = 4(x+4)
6. 2[(4x-2) + 16] = 6x + 5)
REZOLVARI COMPLETE SI CORECTE SI VA DAU COROANA :)

Answer 1

1. 5(x-7)-2x=x-41
5x-35-2x=x-41
3x-35=x-41
3x-x=-41+35
2x= 6
x= 6:2
x=3


2. 7(x-9)-4x=x-39
7x-63-4x=x-39
3x-63=x-39
3x-x=63-39
2x=24
x= 24:2
x=12


3. 4(x+5)-3(x-3)=2(x+15)
4x+20-3x+9=2x+30
x+29=2x+30
2x-x=30-29
x=1


4.
5(x+2)-4(x-2)=3(x+8)
5x+10-4x+8=3x+24
x+18=3x+24
x-3x=24-18
-2x=6
x= 6:(-2)
x=-3


5. 2[15+3(x-1)]=4(x+4)
2[15+3x-3]= 4x+16
2[12+3x]=4x+16
24+6x=4x+16
6x-4x=16-24
2x=-8
x= -8:2
x=-4