Question

1) |7x+2|=16
2) |13x+5|=1-2x
3) |13x+5|=1-2x
Va rog ajutați-ma!!

Answer 1

$\displaystyle 1).|7x+2|=16 \\ 7x+2=16 \\ 7x=16-2 \\ 7x=14 \\ x= \frac{14}{7} \\ x=2 \\ 7x+2=-16 \\ 7x=-16-2 \\ 7x=-18 \\ x=- \frac{18}{7}$
$\displaystyle 2).|13x+5|=1-2x \\ 13x+5=1-2x \\ 13x+2x=1-5 \\ 15x=-4 \\ x=- \frac{4}{15} \\ 13x+5=-1+2x \\ 13x-2x=-1-5 \\ 11x=-6 \\ x=- \frac{6}{11}$