6у-(у-1)=2(2у-4) 4)6у-(у-1)=2(2у-4)
6у-у-1 = 4у-8 6у-у+1 = 4у – 8 6у-у+1=4у-4 6у-у+1=4у-8
5у-1= 4у-8 5у +1= 4у-8 5у+1 =4у-4 5у-у+1=4у-8
5у-4у=-8+1 5у-4у = -8-1 5у-4у= - 4-1 5у-4у=-8+1
у = - 7 у= -9 у= -5 у= -7
Задание 2 команде:
1) 3х-(12-х) =4(5-х) 2)3х-(12-х) = 4(5-х) 3)3х-(12-х)=4(5-х) 4)3х-(12-х)=4(5-х)
3х-12+х =20-х 3х-12+х=20-4х 3х-12+х = 20-4х 3х-12-х=20-4х
4х+х=20+12 4х-12 = 20-4х 4х-12=20-4х 2х-12=20-4х
5х=32 4х+4х=20-12 4х+4х=20+12 2х+4х=20+12
х= 6,4 8х=8 8х=32 6х=32
х=1 х=4
Задание 3 команде:
1) 4х-(-х-1) =2(х-2) 2)4х-(-х-1) = 2(х-2) 3)4х-(-х-1)=2(х-2) 4) 4х-(-х-1)=2(х-2)
4х+х-1 =2х-4 4х+х+1=2х-2 4х+х+1 = 2х-4 4х+х+1=2х-4
5х-1= 2х-4 5х+1 = 2х-2 5х+1=2х-4 5х-2х=-1-4
5х-2х=-4+1 5х-2х=-1-2 5х-2х=-4+1 3х= -5
3х= -3 3х= -3 3х= -3
х= -1 х= -1 х= -1