Răspuns:
Explicație pas cu pas:
a ) 7x+4+2x-10 = 8x + 1
7x + 2x - 8x = 1 + 10 - 4
x = 7
b) 2x + 6 -10x - 5 = 12x - 19
6 - 5 + 19 = 12x + 10x - 2x
20 = 20 x
x = 20 / 20 = 1
c) 3x + 15 - 6x + 12 = 4x + 8 - 5x + 20 + 1
15 + 12 - 8 - 20 - 1 = 4x - 5x + 6x - 3x
- 1 = 2x, x = -1/2
d) 2x + 5 + 9x - 3 = 8 - 56x + 2 + 3x
2x + 9x + 56x - 3x = 8 + 2 - 5 + 3
64x = 8, x = 8 / 64 = 1 / 8
