Question

спростіть вираз -3(1.2х-2)-(3-4.6х)+6(0.2х-1) якщо х = -15/22

Answer 1

$-3left(1.2x-2right)-left(3-4.6xright)+6left(0.2x-1right)=\=-3.6x+6-3+4.6x+1.2x-6=\=2.2x-3\\x=-frac{13}{22} \\2frac{2}{10}x-3 = frac{x}{y} =frac{22}{10}cdot(-frac{15}{22})-3= \= -frac{15}{10}=-1,5-3=-4,5$