Andy C. answered 09/25/18
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100% - 15% = 85% = 0.85
X + 0.85X = 1125
1*x + 0.85*X = 1125
1.85X = 1125 <--- combines like terms
185X = 112500
X = 608.11
608.11 and 0.85*608.11=516.89