Question

Помогите найти корень уравнения .! 9-7(х+3)=5-6х. 3/4(1/6х-1/3) =2х-11/1/2

Answer 1

$9 - 7(x + 3) = 5 - 6x \ 9 - 7x - 21 = 5 - 6x \ - 7x - 12 = 5 - 6x \ - 7x + 6x = 5 + 12 \ - x = 17 \ x = - 17$
$frac{3}{4} ( frac{1}{6} x - frac{1}{3} ) = 2x - 5.5 \ frac{1}{8}x - frac{1}{4} = 2x - frac{11}{2} \ frac{1}{8} x - frac{16}{8} x = frac{1}{4} - frac{22}{4} \ - frac{ 15}{8} x = - frac{21}{4} \ x = frac{21}{4} div frac{15}{8} = frac{21 times 8}{4 times 15} = frac{7 times 2}{5} = \ = frac{28}{10} = 2.8$