How do you solve substitution to the equation y=-2x +1 4x+y=9

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression

Maurice has 54 fewer comic books than rebecca. they have 130 comic books together .how many comic books are in maurices collection ? how many comic books are in rebeccas collection

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12