exam Maths Puzzle Numerical Ability

Please help me slove this equation
x-1=y

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exam Other Question

Use elimination to solve: 6x-y/4=-9
3x+2y=-30 Walnuts cost $.20 per pound more than peanuts. If Teal paid $5.10 for 4 pounds of peanuts and 6 pounds of walnuts, what did she pay per pound for each?