exam Maths Puzzle Numerical Ability

determine the domain and range

y= -2x+1

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Please help me solve this 6-5(3x-3)=-54 I am just brain dead this morning and am not sure about this. I am coming up with no solution but would appreciate a second opinion. Thanks so much for your help. Business and finance. The cost of producing a number ofitems x is given by C=mx+b, in which b is the fixed cost andm is the variable cost (the cost of producingone more item).
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