exam Maths Puzzle Numerical Ability

wHAT IS THE LINEAR EQUATION ANSWER FOR 7x+2y=o, and I have to graph it by corridinate like
x y
0,0
1,1
2,2 and it have to make a straghit line thanks u

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log3 (x) + log 3 (x-2) = log 3 (8) Can you help me solve my word problem...instructions...the cost in dollars of manufacturing (w)wing nuts is given by the xpression 0.07w + 13.3. Find the cost when 375 wing nuts are made. What is the average cost to manufacture one wing nut?