Question

Select the correct answer.

Which statement best describes the solution to this system of equations?
3x + y = 17
x + 2y = 49

Answer 1

x = -3 and y = 26

Explanation:

a) 3x + y = 17

b) x + 2y = 49

b) x = -2y + 49

a) 3(-2y + 49) + y = 17 (substitution)

-6y + 147 + y = 17

-5y + 147 = 17

147-17 = 5y

130/5 = y

a) 3x + 26 = 17

3x = -26 + 17

x = 9/3

x = -3