Question

Graphically, the pair of equations 7x - y = 5; 21x - 3y = 10 represents two lines which are​

Answer 1

Graphically, the pair of equations 7x - y = 5 and 21x - 3y = 10 represent two lines which are parallel lines.

Explanation:

• The first equation is 7x - y = 5
• The second equation is 21x - 3y = 10

• Multiplying 3 to the first equation, we get
• 21x - 3y = 15, whose left hand side is similar to the that of the second equation.

• The constant part for the equations are different.

• Thus the lines are parallel to each other.

Answer 2

Graphically, the pair of equations 7x - y = 5 and 21x - 3y = 10 represent two lines which are parallel lines.