Question

Помогите с номером пять

Answer 1

$x = frac{21}{3} = 7 \ x = - frac{5 times 3}{10 times 2} = frac{3}{4} \ x = - frac{0.15}{0.5} = - 0.3 \ p = 11 \ 3x = - 13 \ x = - frac{13}{3}$

Answer 2

$1)-3x=-21 \x=7\\2)-frac{2}{5} x=frac{3}{10} |*frac{5}{2} \x=-frac{3}{4} \x=-0.75\\3)0.5x+0.15=0\0.5x=-0.15\x=-0.3\\4) 0.3p-5=6-0.7p\0.3p+0.7p=6+5\x=11\\5)(6-2x)+4=-5x-3\6-2x+4=-5x-3\10-2x=-5x-3\-2x+5x=-3-10\3x=-13\x=-frac{13}{3}$