48-X = 3×( X + 6

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48-X=3×(X+648-X=3×(X+648-X=3×(X+648-X=3×(X+6)=>48-X=3X+18=>30=4X（移项并合并同类项）=>X=7.548-x=3x+184x=30x=7.

48-X = 3×( X + 6
48-X = 3×( X + 6

48-X = 3×( X + 6
48-X = 3×( X + 6 )
=>48-X = 3X + 18
=>30 = 4X （移项并合并同类项）
=>X = 7.5

48-x=3x+18
4x=30
x=7.5

48-X = 3×( X + 6 )，48-X=3X+18,30=4X，X=15/2=7.5

48-X=3*X+18
4*X=30
X=15/2
或X=7.5