Question

Решите урванение:
2/15(b+5)-3/10(5b-1)=4

Answer 1

$frac{2}{15} (b+5)- frac{3}{10} (5b-1)=4$
$frac{2}{15} b+ frac{2}{3} - frac{3}{2}$ b+$frac{3}{10} =4$
$frac{4}{30} b- frac{45}{30} b=4- frac{9}{30} - frac{20}{30}$
$- frac{41}{30} b=3 frac{1}{30}$
$b= frac{91}{30}* -frac{30}{41} \ b= -frac{91}{41} \ b=-2 frac{9}{41}$