Question

Zad.1

Rozwiąż równanie:

a) 2(3x-4)=10

b) 4(x+3)-2=-6

Zad.2

Roziąż równania:

a) 6x-7(11+2x)+2=-4(15-x)+3x

b) 3(5x+3)=7(x+5)-3(2-x)

c) 2(x-1)+4(x-3)=-3(x-2)+9x

Answer 1

1

2(3x-4)=10

6x-12=10   /+12

6x=22   /:6

x= 3.6

 

4(x+3)-2=-6

4x+13-8=-6

4x+5=-6   /-5

4x=11

x=3.10

 

Answer 2

zad.1
a) 2(3x-4)=10
6x-8=10
6x=10+8
6x=18 /:6
x=3

b)4(x+3)-2=-6
4x+12-2=-6
4x+10=-6
4x=-6-10
4x=-16 /:4
x=-4
zad.2
a) 6x-7(11+2x)+2=-4(15-x)+3x
6x-77-14x+2=60+4x+3x
6x-14x-3x-4x=60+77-2
1x=135
x=135

b)3(5x+3)=7(x+5)-3(2-x)
15x+9=7x+35-6+3x
15x-7x-3x=35-6-9
5x=20   /:5
x=4

c) 2(x-1)+4(x-3)=-3(x-2)+9x
2x-2+4x-12=-3x+6+9x
6x-14=6x+6
6x+6x=6+14
0=20