3(3x+5)-5(x+1)=1*15
9x+15-5x-5=15
9x-5x=15+5-15
4x=5
x=1,25
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3(3x+5)-5(x+1)=1*15
9x+15-5x-5=15
9x-5x=15+5-15
4x=5
x=1,25
9x+15-5x-5=15
9x-5x=15+5-15
4x=5
x=1,25
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