Question

1. Solve the following system of equations by elimination. What is the value of x?
3x - 4y -5
-3x - 4y = -11

A. x = 2
B. x = -1
C. x = 1
D. x = -2

Answer 1

Answer:

x = 1 (Option C)

Step-by-step explanation:

3x - 4y = -5 (1)

-3x - 4y = -11 (2)

On adding

3x - 4y - 3x - 4y = -11 + 5

6x = 6

x = 6/6

x = 1

Answer 2

Elimination method is a method of eliminating one of the variables from the two equations whose remaining variables will be simplified..

3x - 4y= -5 (×1) 3x - 4y= -5

-3x - 4y= -11 (×1) -3x - 4y = -11 (-)

6x = 6

6x/6 = 6/6

x = 1

the value of x is 1

Answer: Option [C]