Question

Solve the equation below

Answer 1

(-2, 3)

Explanation:

Substitute 2x + 7 for y in y = -2x - 1

• 
  `2x + 7=-2x-1`

Add 2x to both sides

• 
  `2x + 7 + 2x = -2x - 1 + 2x`
• 
  `4x + 7 = -1`

Subtract 7 from both sides.

• 
  `4x + 7 - 7 = -1 - 7`
• 
  `4x = -8`

Divide both sides by 4.

• 
  `(4x)/(4)= (-8)/(4)`
• 
  `x = -2`

Substitute -2 for x in y = 2x + 7

• 
  `y = 2(-2)+7`

Simplify both sides.

• 
  `y = -4 + 7`
• 
  `y = 3`

Therefore, the answer is (-2, 3).