Question

a)2(x-4)3x-2

b)1/5x+4+1/2(x+2)
c)-3x-8+2x+4
d)2x-5+4(1/2x-3)
e)-5x+1+-3(x-2)+2
f)x+1/x+3=8/5
g)-3x+1/2+x/4
h)-2(x-6)=5x+1
i)-2x+7=12
j)1/5x=3/25
k)-4(x+2)=-5(x-1)
l)2x+4=-3x-1
m)1/3x+6-1/4x=1
n)-2x+4=-5x-6
o)-2(x+1)=5x+3-4x

:)

Answer 1

a)2(x-4)=3x-2
2x -8 = 3x - 2
-x = 6 /:(-1)
x = -6

b)1/5x+4=1/2(x+2)
1/5x + 4 = 1/2x + 1 /*10
2x + 40 = 5x + 10
-3x = -30 /:(-3)
x = 10

c)-3x-8=2x+4
-5x = 12 /:(-5)
x = -2,4

d)2x-5=4(1/2x-3)
2x -5 = 2x - 12
2x - 2x = -12 +5
0 = -7 równanie sprzeczne.

e)-5x+1=-3(x-2)+2
-5x + 1 = -3x + 6 + 2
-2x = 7 /:(-2)
x = -3,5

f)x+1/x+3=8/5
(x+1)5 = 8(x+3)
5x + 5 = 8x + 24
-3x = 19 /:(-3)
x = -19/3

g)-3x+1/2=x/4 /*4
-12x + 2 = x
-13x = -2 /:(-13)
x = 2/13


h)-2(x-6)=5x+1
-2x + 12 = 5x + 1
-2x - 5x = 1 - 12
-7x = -11 /:(-7)
x = 11/7

i)-2x+7=12
-2x = 12 - 7
-2x = 5 /:(-2)
x = -2,5

j)1/5x=3/25 /*25
5x = 3 /:5
x = 0,6

k)-4(x+2)=-5(x-1)
-4x - 8 = -5x + 5
-4x + 5x = 5 + 8
x = 13

l)2x+4=-3x-1
2x + 3x = -1 -4
5x = -5 /:5
x = -1

m)1/3x+6-1/4x=1 /*12
4x + 72 - 3x = 12
x = -60

n)-2x+4=-5x-6
3x = -10 /:3
x = -10/3

o)-2(x+1)=5x+3-4x
-2x - 2 = 5x + 3 - 4x
-3x = 5 /:(-3)
x = -5/3