Equations of parallel lines in standard form Ax+By=C only need differ by the
constant C. Thus the line through
(1,0)
parallel to the line with equation
4x + 10y = 20
can have an equation with the same left side, 4x + 10.
All we need do is substitute (1,0) in the left side
4(1) + 10(0) = 4 + 0 = 4
to find the constant.
So one answer could be
4x + 10y = 4
However since that can be divided through by 2, we should
do so and get
2x + 5y = 2 <--answer
Edwin