Question

Y = -2x - 5
6x + 3y = -15

Answer 1

Infinite solutions

Explanation:

Substitute -2x - 5 for y in 6x + 3y = -15

• 
  `6x + 3 (-2x-5)=-15`
• 
  `6x + (3)(-2x)+(3)(-5) = -15` (simplify both sides of the equation
• 
  `6x -6x-15 =-15`
• 
  `-15 = -15`
• 
  `-15 + 15 = -15 + 15` (add 15 to both sides)
• 
  `0 = 0`

Therefore, the answer is infinite solutions.