exam Maths Puzzle Numerical Ability

Stuck, can someone help?

Graph 3x + 2y = 6.

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exam Other Question

hi I do not undrestand solving using substitution method for example
x=y-1 x=y+6 r=-3s
y=4-2x y=-2-x r=10-4s

hi can I have some help with this function?

Use the function to evaluate the indicated expressions and simplify.

f(a), f(a+h), and f(a+h)-f(a)/h, where h does not equal 0.