book Maths Puzzle Numerical Ability

2x-5=7y+3x

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book Other Question

how do you determine whether the graph is a circle, ellipse,hyperbole, or parabola?
7x-2y=14
y= 2x2+6x-3
Can someone please help me solve this problem. I already sent it yesterday, but did not get a response. Thanks in advance.

Suppose you invest $12,000 in two funds paying 10.5% a