Question

Выразите х через у.

1) 1/4х-1/7у=-2

Answer 1

1)

1/4x-1/7y=-2

1/4x=-2+1/7y

x=(-2+1/7y)*4

x=-8+4/7y

Answer 2

$frac{1}{4} x-frac{1}{7}y=-2\\frac{1}{4} x=frac{1}{7}y-2\\x=frac{frac{1}{7}y-2 }{frac{1}{4} }=(frac{1}{7} y-2)*4=frac{4}{7}y-8\\x=frac{4}{7}y-8$