Question

дам 20 баллов и лучший ответ!

Answer 1

( 1 )

$2x-1<x+3\\5x-1>6-2x\\x-5<0\\\\2x-x<3+1\\5x+2x>6+1\\x<5\\\\x<4\\7x>7\\x<5\\\\x<4\\x>1\\x<5$

x ∈ ( 1 ; 4 )

( 2 )

$-1\leq 15a+14<44\\\\\left \{ {{15a+14\geq -1} \atop {15+14<44}} \right. \\\\\left \{ {{15a\geq -1-14} \atop {15a<44-14}} \right. \\\\\left \{ {{15a\geq -15} \atop {15a<30}} \right. \\\\\left \{ {{a\geq -15:15} \atop {a<30:15}} \right. \\\\\left \{ {{a\geq -1} \atop {a<2}} \right. \\\\-1 \leq a<2$

a ∈ [ -1 ; 2 )

( 3 ) (a)

$x>8\\x>7\\x>-4$

x ∈ ( 8 ; +∞ )

( б )

$m>9\\m>10\\m<12$

m ∈ ( 10 ; 12 )