solve 3 (x+6) +2 (x+3) =54
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=3x +18+2x+12=54
=3x+2x+18+15=54
=5x+30=54
=5x=54-30=24
=x=24÷5=4.8
=3x+2x+18+15=54
=5x+30=54
=5x=54-30=24
=x=24÷5=4.8
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