Respuesta:
-7x - 9 = -9x+ 9
-7x + 9x = 9 + 9
2x = 18
x = 18 : 2
x = 9
Verificación:
-7 . 9 - 9 = -9 . 9 + 9
-63 - 9 = -81 + 9
-72 = -72
-7x + 4 = 18
-7x = 18 - 4
-7x = 14
x = 14 : ( -7 )
x = -2
-7 . (-2) + 4 = 18
14 + 4 = 18
18 = 18
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Verified answer
Respuesta:
-7x - 9 = -9x+ 9
-7x + 9x = 9 + 9
2x = 18
x = 18 : 2
x = 9
Verificación:
-7 . 9 - 9 = -9 . 9 + 9
-63 - 9 = -81 + 9
-72 = -72
Respuesta:
-7x + 4 = 18
-7x = 18 - 4
-7x = 14
x = 14 : ( -7 )
x = -2
Verificación:
-7 . (-2) + 4 = 18
14 + 4 = 18
18 = 18