1. а) 3х+7=0
3х=-7
х=-7/3
х=-2,33333333333
б) 13-100х=0
-100х=-13
х=-13/-100
х=0,13
в) 0,5х+0,15=0
0,5х=-0,15
х=-0,15/0,5
х=-0,3
г) 8-0,8х=0
-0,8х=-8
х=-8/-0,8
х=10
2. а) 7х-4=х-16
7x – x = – 16 + 4
6x = -12
x = -2
б) 13-5х=8-2х
– 5x + 2x = 8 – 13
-3x = -5
x = -5/-3
х=1,66666666667
в) 4y+15=6y+17
4y – 6y = 17 – 15
-2y = 2
y = -1
г) 1,3p-11=0,8p+5
1,3p – 0,8p = 5 + 11
0.5p = 16
p = 32
д) 0,71х-13=10-0,29х
0,71x + 0,29x = 10 + 13
x = 23
3. а) 5х+(3х-7)=9
5x + 3x – 7 = 9
5x + 3x = 9 + 7
8x = 16
x = 2
б) 3у-(5-у)=11
3y – 5 + y = 11
3y + y = 11 + 5
4y = 16
y = 4
в) 48=11-(9а+2)
48 = 11 – 9a – 2
9a = – 2 + 11 – 48
9a = -39
3a = -13
a = -13/3
а=-4,33333333333
г) 13-(5х+11)=6х
13 – 5x – 11 = 6x
– 5x – 6x = 11 – 13
-11x = -2
x = -2/-11
х=0,18181818181
4. а) (7х+1)-(6х+3)=5
7x + 1 – 6x – 3 = 5
7x – 6x = 5 + 3 – 1
x = 7
б) (8х+11)-13=9х-5
8x + 11 – 13 = 9x – 5
8x – 9x = – 5 + 13 – 11
-x = -3
x = 3
в) 2=(3х-5)-(7-4х)
2 = 3x – 5 – 7 + 4x
– 3x – 4x = – 7 – 5 – 2
-7x = -14
г) 8х+5=119+(7-3х)
8x + 5 = 119 + 7 – 3x
8x + 3x = 7 + 119 – 5
11x = 121
x = 11
1. а) 3х+7=0
3х=-7
х=-7/3
х=-2,33333333333
б) 13-100х=0
-100х=-13
х=-13/-100
х=0,13
в) 0,5х+0,15=0
0,5х=-0,15
х=-0,15/0,5
х=-0,3
г) 8-0,8х=0
-0,8х=-8
х=-8/-0,8
х=10
2. а) 7х-4=х-16
7x – x = – 16 + 4
6x = -12
x = -2
б) 13-5х=8-2х
– 5x + 2x = 8 – 13
-3x = -5
x = -5/-3
х=1,66666666667
в) 4y+15=6y+17
4y – 6y = 17 – 15
-2y = 2
y = -1
г) 1,3p-11=0,8p+5
1,3p – 0,8p = 5 + 11
0.5p = 16
p = 32
д) 0,71х-13=10-0,29х
0,71x + 0,29x = 10 + 13
x = 23
3. а) 5х+(3х-7)=9
5x + 3x – 7 = 9
5x + 3x = 9 + 7
8x = 16
x = 2
б) 3у-(5-у)=11
3y – 5 + y = 11
3y + y = 11 + 5
4y = 16
y = 4
в) 48=11-(9а+2)
48 = 11 – 9a – 2
9a = – 2 + 11 – 48
9a = -39
3a = -13
a = -13/3
а=-4,33333333333
г) 13-(5х+11)=6х
13 – 5x – 11 = 6x
– 5x – 6x = 11 – 13
-11x = -2
x = -2/-11
х=0,18181818181
4. а) (7х+1)-(6х+3)=5
7x + 1 – 6x – 3 = 5
7x – 6x = 5 + 3 – 1
x = 7
б) (8х+11)-13=9х-5
8x + 11 – 13 = 9x – 5
8x – 9x = – 5 + 13 – 11
-x = -3
x = 3
в) 2=(3х-5)-(7-4х)
2 = 3x – 5 – 7 + 4x
– 3x – 4x = – 7 – 5 – 2
-7x = -14
x = 2
г) 8х+5=119+(7-3х)
8x + 5 = 119 + 7 – 3x
8x + 3x = 7 + 119 – 5
11x = 121
x = 11