Odpowiedzi

2010-02-03T18:42:47+01:00

1.

6y+3=39
6y=39-3
6y=36/:6
y=6
7y-4=-10
7y=-10+4
7y=-6/7
y=-6/7
5y-3=-12
5y=-12+3
5y=-9
y=-9/5


2.

2+3(x+1)=5
2+3x+3=5
3x=5-5
3x=0

3-2(x+2)=7
3-2x-4=7
-2x=0

1+5(2x+3)=6
1+10x+15=6
10x=-10/:10
x=0

3.
x+7+2x-3=4x+10
-1x=3
2010-02-03T18:45:12+01:00
6y=39-3
6y=36/:6
y=6
7y=-10+4
7y=6/:7
y=6/7
5y=-12 +3
5y=-9/:5
y=1cała 4/5
2.
2+3x +3=5
3x=5-5
3x=0
3-2x-4=7
-2x=7+4 -3
-2x=8/:-2
x=-4
1+10x _15=6
10x=6-15-1
10x=-10/:10
x= -1
3.
x +7+2x-3=4x +10
-4x +x +2x= 10+3 -7
-1x=6/:-1
x= -6
2010-02-03T19:12:56+01:00
1.

6y+3=39
6y=39-3
6y=36 / 6
y=6


7y-4=-10
7y=-10+4
7y=-6 / 7
y=-6/7

5y-3=-12
5y=-12+3
5y=-9 / 5
y=-9/5



2+3(x+1)=5
2+3x+3=5
3x=5-5
3x=0 / 3
x=0

3-2(x+2)=7
3-2x+4=7
-2x=7-4-3
-2x=0 / 2
-x=0 /* -1
x=0

1+5(2x+3)=6
1+10x+15=6
10x=6-15-1
10x=-10 / 10
x=-10 /10
x=-1


x+7+2x-3=4x+10
x+2x-4x=10-7+3
-x=6 /-1
x=-6