15-3x+3=5-4x; -3x+4x=5-3-15; x= -13. Ответ: x= -13.
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15-3x+3=5-4x; -3x+4x=5-3-15; x= -13. Ответ: x= -13.
15-3х+3=5-4х
-3х+4х=5-15-3
х=-13