Question

A system of equations is shown below.

y = 2x - 3
y = 5x + 6
What is the value of x + y?
A. -12
B. -9
C. 9
D. 12
Please help me!!!!

Answer 1

-12

Explanation:

Step1: Add 3 to both sides of the equation

2x -3 = 5x +6

+3 +3 = 9

Step2: subtract 5x from both sides of the equation

2x = 5x +9

-5 -5

Step3: divide both sides of the equation by the same term

-3x(/ -3) = 9(/-3)

X=-3

Step4: multiply -3 with 2

-3x2= -6

Step4: subtract -6 with 3

-6 - 3= -9

Y=-9

Step5: add the -9 to -3

-9 + -3 = -12

ANSWER: -12