а) 2x + 5 = 4(x+1) + 11
2x + 5 = 4x + 4 + 11
2x – 4x = 11 + 4 – 5
-2x = 10
x = -5
б) 6x = 1 - (4-5x)
6x = 1 – 4 + 5x
6x – 5x = – 4 + 1
x = -3
в) 15(x+2) - 30 = 12x
15x + 30 – 30 = 12x
15x – 12x = 30 – 30
x = 0
г) 6( x-1) = 9,4 = 1,7x
6x – 6 = 9.4 = 1.7x
6x – 1,7x = 9,4 + 6
4.3x = 15.4
43x = 154
x = 154/43
х=3,58139534884
д) 0,15(x-4) = 9,9 - 0,3 (x-1)
0.15x – 0.6 = 9.9 – 0.3x + 0.3
0,15x + 0,3x = 0,3 + 9,9 + 0,6
0.45x = 10.8
x = 24
е) 3,8x - (1,6 - 4,2x ) = 9,6 + (3,7 - 5x)
3.8x – 1.6 + 4.2x = 9.6 + 3.7 – 5x
3,8x + 4,2x + 5x = 3,7 + 9,6 + 1,6
13x = 14.9
130x = 149
x = 149/130
х=1,14615384615
а) 2x + 5 = 4(x+1) + 11
2x + 5 = 4x + 4 + 11
2x – 4x = 11 + 4 – 5
-2x = 10
x = -5
б) 6x = 1 - (4-5x)
6x = 1 – 4 + 5x
6x – 5x = – 4 + 1
x = -3
в) 15(x+2) - 30 = 12x
15x + 30 – 30 = 12x
15x – 12x = 30 – 30
x = 0
г) 6( x-1) = 9,4 = 1,7x
6x – 6 = 9.4 = 1.7x
6x – 1,7x = 9,4 + 6
4.3x = 15.4
43x = 154
x = 154/43
х=3,58139534884
д) 0,15(x-4) = 9,9 - 0,3 (x-1)
0.15x – 0.6 = 9.9 – 0.3x + 0.3
0,15x + 0,3x = 0,3 + 9,9 + 0,6
0.45x = 10.8
x = 24
е) 3,8x - (1,6 - 4,2x ) = 9,6 + (3,7 - 5x)
3.8x – 1.6 + 4.2x = 9.6 + 3.7 – 5x
3,8x + 4,2x + 5x = 3,7 + 9,6 + 1,6
13x = 14.9
130x = 149
x = 149/130
х=1,14615384615