Question

Resolva o seguinte sistema de equações:

3X + 2 Y = 44
2X - Y = 6

Answer 1

Olá,

{3x + 2 y = 44

{2x - y = 6

2x − y + −2x = 6 + −2x

−y = −2x + 6

-y/-1 = -2x + 6 / 1

y = 2x − 6

3x + 2y = 44

3x + 2(2x − 6) = 44

7x − 12 = 44

7x − 12 + 12 = 44 + 12

7x = 56

7x/7 = 56/7

x = 8

y = 2x − 6

y = (2 . 8) − 6

y = 10