Odpowiedź:
1) 7- 3 ( 2-3a) +a= 4
7- 6+9a +a=4
10a= 4 +6-7
10a= 3 /: 10
a= 3/10
spr.. 7- 6 + 9*3/10+3/10=4
7 - 6 + 27/10 +3/10=4
1 + 2 i 7/10 + 3/10= 4
4=4
L=P
2) 3 ( 4 +2p) -3 + 2p = - 5
12 +6p -3 + 2p= - 5
8p= -5 +3 -12
8p= -14 /: 8
p= - 14/8 = - 1 i 3/4
spr... 12 + 6* (-14/8) -3 + 2* (-14/8) = - 5
12 -84/8 -3 - 28/8= - 5
12 - 10 i 4/8 -3 -3 i 4/8= - 5
12 - 17= - 5
-5= - 5
L=P
3) -2 ( w-1) -4w +7 = 1
-2w +2 -4w +7= 1
-6w= 1 -7 -2
-6w= -8 /:6
w= 8/6= 1 i 1/3
spr... -2 * 8/6 +2 -4*8/6 +7= 1
-8/3 +2 -16/3 +7=1
-8 +2 +7= 1
-8 +9= 1
1=1
L=P
4) 4 ( y+1) -4 +3y= 1
4y +4 -4 +3y= 1
7y=1 /:7
y= 1/7
spr... 4*1/7 +4-4 +3*1/7= 1
4/7 + 3/7=1
1=1
L=p
5) 2r -6 - ( r+7) = - 3
2r -6 -r -7= - 3
r= -3 +6 +7
r= 10
spr.. 2*10 -6 -10 -7 = -3
20- 23= - 3
-3= - 3
L=P
6) 5+4 ( 4-3h ) +2h =11
5 + 16 -12h+2h =11
-10h= 11 -5-16
- 10 h= -10 /:10
h= 1
spr.. 5 +16 -12*1 +2*1=11
21 -12 + 2= 11
23 -12= 11
11= 11
L=P
Szczegółowe wyjaśnienie:
