Question

помогите решить неравенство

Answer 1

$\displaystyle 1)4+12x\geq 7+13x\\12x-13x\geq 7-4\\-x\geq 3\\x\leq -3=x\in (-\infty,-3]\\\\2)2(3+x)-(4-5x) < 9\\6+2x-4+5x < 9\\2=7x < 9\\7x < 9-2\\7x < 7\\x < 1=x\in(-\infty,1)$

Answer 2

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