Question

помогите с номером 5

Answer 1

5.
$frac{2(7y-4)}{18}- frac{2(8-2y)}{18} = frac{3y+3}{4}$
$frac{14y-8-24+6y}{18} = frac{3y+3}{4}$
$frac{20y-32}{18} = frac{3y+3}{4}$
$frac{10y-16}{9} = frac{3y+3}{4}$
(10y-16)*4=(3y+3)*9
40y-64=27y+27
40y-27y=27+64
13y=91
y=91/13
y=7

2x²-x=0
x(2x-1)=0
x=0
2x-1=0
2x=1
x=1/2