Математика номер 781
Ответ:
Пошаговое объяснение:
1) 3.4x-4=4.8-x
3.4x+x=4.8+4
4.4x=8.4
x=2
2)2x+7 = x+5.5
2x-x = 5.5-7
x = - 1.5
3) 5-3x = 2x-8
-3x-2x = -8-5
-5x = -13
x=13/5 = 2 3/5
4) 9.5x+2 = 5.7x-5.6
9.5x-5.7x = -5.6-2
3.8x = -7.6
x = -2
5) 1.5x+8 = 3.1x+16
1.5x-3.1x = 16-8
-1.6x = 8
x = -5
6) 2.9x +7.4 = x+1.7
2.9x-x = 1.7-7.4
1.9x = -5.7
x = -3