Sagot :
3x+15=45-2x
3x+2x=45-15
5x=30
x=6dır.................................................
9x/3 3x olur 3x+15=45-2x bilinenler bi tarafa bilinmeyenler bi tarafa yap 3x+2x=45-15 olur
5x=30 olur x=6 olur cevap
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