Question

1) -1,2х=$frac{3}{4}$ 2) 0,25у=-7 3) 2х-8=4-х

Answer 1

1)
$x= frac{3}{4} :(-1,2)= frac{3}{4} :(- frac{12}{10} )= frac{3}{4} * (-frac{10}{12} )=- frac{5}{8}$
2) y = - 7:0,25 = - 28
3) 2x+x = 4+8
     3x = 12
     x = 4