exam Maths Puzzle Numerical Ability

Solve the system by graphing
x - y = 2
3x - 3y = 6

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I need help solving this logarithmic equation

log 5(7+x)+log5 (8-x)-logx5 2=2 In March, Rodney sold twice as many cars as Greg. In April, Rodney sold 5 fewer cars than he did in March, while Greg sold 3 more cars that he did in March. If they sold the same