Question

Ajutatimva va rog corect sa fie exercitile

Answer 1

a) 5(-x+2)=-4(2x-4)
-5x+10=-8x+16
-5x+8x= 16-10
3x=6
x=2
S={2}
b) 2(x-3)-5(3x=4)=-8x+4
2x-6-15x-20=-8x+4
-13x-26=-8x+4
-5x= 30
x=-6
s={-6}
c) -3(-5x+7)+8=4(4x-5)-42
2x-21+8 = 16x-20-42
15x-13= 16x-62
15x-16x=-49
-x=-49
x=49
S={49}
d) 9x la 2-36=0
(3x-6)(3x+6)=0
3x-6=o
3x=6
x=2
3x+6=0
3x=-6
x=-2
S={2,-2}
e) 7x la 2-9=sx la 2+18
7 x la 2-4 x la 2=18+9
3xla 2=27
x la 2= 9
x=3
S={3}
g) radical din(x+1) la 2=5
x+1=5
x=4
s={4}
h) 5-[1+(-7+x)]=2
1+(-7+x)=3
-7+x=2
x=9
s={9}