What is the solution to $2x-y=4, -10x+5y=-20$ ?

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Answer 1 · 2016-12-03T13:17:12

Infinite solutions, they are the same equation and there is certainly more than one value for each.

$2x-y=4 " "|xx (-5)$

$-10x+5y=-20$ (the same as the second equation)

The equations are identical

${(-10x+5y=-20), (-10x+5y=-20) :}$

which means that you have an infinite number of solutions, i.e. both equations represent the same line.

What is the solution to 2x-y=4, -10x+5y=-202x-y=4, -10x+5y=-20?