ответ:3x+(5x−2)<3−2x3x+5x−2<3−2x3x+5x+2x<3+210x<5x<0.5
4(5x - 1) - 21x > 1 - 3x \\ 20x - 4 - 21x > 1 - 3x \\ 20x - 21x + 3x > 1 + 4\\ 2x > 5 \\ x > 2.5\ }4(5x−1)−21x>1−3x20x−4−21x>1−3x20x−21x+3x>1+42x>5x>2.5
ответ:3x+(5x−2)<3−2x3x+5x−2<3−2x3x+5x+2x<3+210x<5x<0.5
4(5x - 1) - 21x > 1 - 3x \\ 20x - 4 - 21x > 1 - 3x \\ 20x - 21x + 3x > 1 + 4\\ 2x > 5 \\ x > 2.5\ }4(5x−1)−21x>1−3x20x−4−21x>1−3x20x−21x+3x>1+42x>5x>2.5