Question

1) 7x - 4 = 0;
314r + 7,8 < -2,9;
4) 202 - 3 < 8% как решать помогите!!!​

Answer 1

$7x - 4 = 0 \\ 7x = 4 \\ x = \frac{4}{7}$

$14r +7 .8 < - 2.9 \\ 14r < - 2.9 - 7.8 \\ 14r < - 4.9 \\ r < - 0.35$