А) 4x - 5 = 84x = 8 + 54x = 13x = 13/4
Б) 5x - 2x + 4 = 83x + 4 = 83x = 8 - 43x = 4x = 4/3
В) 7 - 3/4x = 16Multiply by 4 to get rid of the fraction:28 - 3x = 64-3x = 36x = -12
А) 4x - 5 = 8
4x = 8 + 5
4x = 13
x = 13/4
Б) 5x - 2x + 4 = 8
3x + 4 = 8
3x = 8 - 4
3x = 4
x = 4/3
В) 7 - 3/4x = 16
Multiply by 4 to get rid of the fraction:
28 - 3x = 64
-3x = 36
x = -12