exam Maths Puzzle Numerical Ability

I am in dyer need at this point, can someone help me?

3x+4y<12
x+3y<6
x>0
y>0

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exam Other Question

Can someone help me on this problem?

I need t solve the system by addition:

x + y = 6
x - y = 4

Thank you,
Lisa Divide.
x^4 + x^2 - 80/ x + 3
The answer I got is this:
x^3 - 3x^2 + 10x + 30 + 10/x+3