Question

). Решите уравнение:а). 3х + 2,7 = 0;б). 2х + 7 = 3х – 2( 3х – 1 );

Answer 1

А). 3х + 2,7 = 0;
3х=0-2,7
3х=-2,7
х= -2,7/3
х=-0.9

б). 2х + 7 = 3х – 2(3х-1)
2х+7=3х-6х+2
2х-3х+6х=2-7
5х=-5
х=-5:5
х=-1

Answer 2

3x=-2, 7; x=-0, 9




2x+7=3x-6x+2;
5x=-5
x=-1

Answer 3

а) 3x + 2.7 = 0 3x = -2.7 x = -2.7/3 x = -0.9

б) 2x + 7 = 3x - 2(3x - 1) 2x + 7 = 3x - 6x + 2 2x + 7 = -3x + 2 2x + 3x = 2 - 7 5x = -5 x = -1

Ответ: а) x = -0.9; б) x = -1