Question

Алгебра 9 Решите неравенство умоляю

Answer 1

$\frac{x-3}{14}*70-\frac{x-7}{35}*70+\frac{2x+3}{5}*70\geq0,1*70\\\\5(x-3)-2(x-7)+14(2x+3)\geq7\\\\5x-15-2x+14+28x+42\geq7\\\\31x+41\geq7\\\\31x\geq -34\\\\x\geq -\frac{34}{31} \\\\x\geq-1\frac{3}{31} \\\\Otvet:\boxed{x\in[-1\frac{3}{31} ;+\infty)}$