exam Maths Puzzle Numerical Ability

need help solving this equation

-12-7=y/3

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exam Other Question

graph each system of equations and describe it as consistent and independent,consistent and dependent, or inconsistent.

y=-x-2
x+y=-4 Can you please help me with these problems I would appreciate it. Thank you so much.
Express as a product:
log base 3^4 radical sign x
Solve for x:
log base 10^7=log base 10^x