Question

Решите плиз
3) 2/3x-15<20
5)31- 4 1/7x>2

Answer 1

$1) \frac{2}{3} x - 15 < 20 \\ \\ 2x - 45 < 60 \\ \\ 2x < 60 + 45 \\ 2x < 105 \div 2 \\ \\ x > \frac{105}{2} \\ \\ 2)31 - 4 \frac{1}{7} x > 2 \\ \\ 31 - \frac{4}{7} x > 2 \\ \\ 217 - 4x > 14 \\ - 4x > 14 - 217 \\ - 4x > 203 \div - 4 \\ \\ x < \frac{203}{4}$

Answer 2

1)
2x-45 < 60

2x <60 + 45

2x < 105

2)
31-29/7x>2

217-29x > 14

-29x > 14 - 217

-29x > -203
x < 7