№5. Решите уравнение: 1) -6x = 48; 3) -1,6x = -6,4; 5) -\frac{4}{9}x=-\frac{1}{7}; 2) 0,8x = -3,2; 4) \frac{1}{7}x = -\frac{3}{14}; 6) -2\frac{1}{4}x = \frac{9}{16}.

Ответ: 1) x = -8; 2) x = -4; 3) x = 4; 4) x = -1.5; 5) x = 9/28; 6) x = -4/5

1) −6x = 48

x = 48 / (−6) = −8

2) 0,8x = −3,2

x = −3,2 / 0,8 = −4

3) −1,6x = −6,4

x = −6,4 / (−1,6) = 4

4) 1/7 x = −3/14

x = (−3/14) / (1/7) = (−3/14) * 7 = −3/2 = -1.5

5) −4/9 x = −1/7

x = (−1/7) / (−4/9) = (1/7) * (9/4) = 9/28

6) -2\frac{1}{4}x = \frac{9}{16}

-9/4 x = 9/16

x = (9/16) / (-9/4) = (9/16) * (-4/9) = -4/16 = -1/4

Ответ: 1) x = -8; 2) x = -4; 3) x = 4; 4) x = -1.5; 5) x = 9/28; 6) x = -4/5