Determine if each expression is True, False or Open:

? True False Open $9 \times y = 5 \times x$

? True False Open $3 - 9 = 12$

? True False Open $5 + x = 3$

? True False Open $7 - 5 + 3 = -5 + 3 + 7$

? True False Open $9 \times 7 = 5$

? True False Open '$3 + 9 = 12$

Hint: