Question

Solve systems of equations for x + y, please!! 7x + y = 6 10x + y = 12

Answer 1

-6

Explanation:

A) 7X + Y = 6 (-1) ------> A) -7X - Y = -6

B) 10X + Y = 12

A) + B) ---> 3X = 6 ------> X = 2

10 . 2 + Y = 12 ------> Y = 12 - 20 = -8

X + Y = 2 - 8 = -6