book Maths Puzzle Numerical Ability

i need help with a probem i dont know how to do this kind of math i waswondering if you can help me with this problem hear it is d+4lessthanoreuqulto sign 6 need to graph and solve

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book Other Question
Solve the nonlinear system:

2x^2+y^2= 6
x^2-4y^2= -15 x/3 - y/2 = - 10/3
I Need Help With This Elimination Method Problem Involving Fractions. Fractions Confuse me. Fractions are Not My friend!!!!!!!!!!!!!