Question

4x+y=6
y=-4x-1
HELP ME

Answer 1

• No solution

Explanation:

Given

• 4x+y=6
• y=-4x-1

Solution 1

Substitute y in the first equation:

• 4x + (-4x - 1) = 6
• 4x - 4x =6 + 1
• 0 = 7

Incorrect, therefore no solution

Solution 2

Writing both equation as lines:

• y = -4x + 6
• y = -4x - 1

As we see both lines have a same slope. It means they are parallel and no intersection.