- A−4
- B12
- C−2
- D4
Step-by-Step Solution
→ . Moving −10 across makes it +10, so → . (Adding instead of subtracting gives the trap answer −4.)
Answer: D) 4
The point (−2, ) lies on the line . Find .
Class 9Linear Equations in Two VariablesLinear Equations
Key idea: Graphing a linear equation
Three steps:
1. Find at least **two solutions** (preferably the and intercepts — easiest to plot).
2. Plot those points on the coordinate plane.
3. Draw a straight line through them.
Every linear equation in two variables graphs as a STRAIGHT LINE. (That's why they're called 'linear'.)
For accuracy: find a third solution and verify it lies on the line — catches arithmetic mistakes.
1. Find at least **two solutions** (preferably the and intercepts — easiest to plot).
2. Plot those points on the coordinate plane.
3. Draw a straight line through them.
Every linear equation in two variables graphs as a STRAIGHT LINE. (That's why they're called 'linear'.)
For accuracy: find a third solution and verify it lies on the line — catches arithmetic mistakes.
Master this chapter in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Linear Equations in Two Variables practice questions
More Class 9 Linear Equations in Two Variables practice
A student writes 4x = 9 − 3y in the standard form as 4x − 3y − 9 = 0. What is wrong?Treated as an equation in two variables, how many solutions does x = 7 have?The pair (2, 5) is a solution of which of these equations?Which equation represents the line drawn parallel to the x-axis, 4 units BELOW it?For 2x + y = 9, what is the value of x when y = 4?