解:5x×8+4x+7等于44x + 7 ∵已知需求出5x×8+4x+7等于多少 ∴5x × 8 + 4x + 7 = (5×8)x + 4x + 7 = 40x + 4x + 7 = 44x + 7 答:5x×8+4x+7等于44x + 7
=40x+4x+7=44x+7