Question

Rozwiąż równie.
a) 4+2(x-1)=6
b)5-2(x+3)=8
c) -1+4(2x-1)=3
d)2x+3(4-x)=x
e)4x+3=11
f)2*x-9=12
g)6x+4=2*x+3

Answer 1

A) 4+2(x-1)=6
4+2x-2=6
2x=6-4+2
2x=4 /:2
x=2

b)5-2(x+3)=8
5-2x-6=8
-2x=8-5+6
-2x=9 /:(-2)
x=-9/2

c) -1+4(2x-1)=3
-1+8x-4=3
8x=3+1+4
8x=8 /:8
x=1

d)2x+3(4-x)=x
2x+12-3x=x
-2x=-12 /:(-2)
x=6

e)4x+3=11
4x=8 /:4
x=2

f)2*x-9=12
2x=21 /:2
x=21/2
x=10 1/2

g)6x+4=2*x+3
6x+4=2x+3
4x=-1 /:4
x= -1/4

Answer 2

A) 4+2(x-1)=6
4+2x-2=6
2+2x=6 /-2
2x=4 / :2
x=2
b) 5-2(x+3)=8
5-2x-6=8
-1-2x=8 /+1
-2x=9 /: (-2)
x=- 4,5
c)-1+4(2x-1)=3
-1+8x-4=3
-5+8x=3 /+5
8x=8 / :8
x=1
d)2x+3(4-x)=x
2x+12-3x=x
-x+12=x /+x
12=2x / :2
6=x
e)4x+3=11 /-3
4x=8 /:4
x=2
f)2*x-9=12 /+9
2x=21 /:2
x=10,5


g)6x+4=2*x+3 /-2x
4x+4=3 /-4
4x= -1 /:4
x= -0,25