3x+7=0
3x=-7
x=-7/3
х=-2,33333333333
7x – 4 = 1x – 16
7x – x = – 16 + 4
6x = -12
x = -2
5x + (3x − 7) + 9 = 5x + 3x − 7 + 9 = 8x + 2
(7x + 1) − (6x + 3) + 5 = 7x + 1 − (6x + 3) + 5 = 7x + 1 − 6x − 3 + 5 = x + 3
3x+7=0
3x=-7
x=-7/3
х=-2,33333333333
7x – 4 = 1x – 16
7x – x = – 16 + 4
6x = -12
x = -2
5x + (3x − 7) + 9 = 5x + 3x − 7 + 9 = 8x + 2
(7x + 1) − (6x + 3) + 5 = 7x + 1 − (6x + 3) + 5 = 7x + 1 − 6x − 3 + 5 = x + 3