Question

metodo sustitucion 3x+4g=8 8x-9g=-77

Answer 1

3X + 4g = 8 despejando, X = 8 - 4g/3

8X - 9g = -77

Reemplazando:

8 ( 8 - 4g/3 ) - 9g = - 77

64 - 32g/3 -9g = -77

g = 7,17

X = -6,89