book Maths Puzzle Numerical Ability

A farmer raises pigs & chickens. He has 220 animals with a total of 700 legs. How many pigs does the farmer have? Must show how. Thank you!

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book Other Question

Graph the following linear equations and advise points:
3x-2y=12
and
y=2x+5

thanks! I need to factor 2a^2-6a^2-108a.

WIll you help me. I have forgotten and need to be refreshed on allot of things. Thank you so much for everything you tutors do.