exam Maths Puzzle Numerical Ability

I would like some help with this problem Thanks
Find the value of x

3+x-2(-4)=7-(-13)

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exam Other Question

How do I graph this using the intercept method...2x+3y=6 Please Help me with this question.
True or false: The function � f(x)=3x � (the x is superscript after the three, I couldn't do that here) grows three times faster than the fu