exam Maths Puzzle Numerical Ability

solve the system by additio or substitution
3x+6y=0
x= 2/3

I have no idea how to work this problem with a fraction. Please help.

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exam Other Question

Use the quadratic formula to solve the equation

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3x^2-40x=59
10. Graph f(x) = -x - 2.





11. Graph the inequality.
3x + y  5


12. The sum of two numbers is 74. The second is 2 more than 3 times the first. What are the