展开 (12=0.074x+2.59+7.4x)*7.4

解答

展开

(12 = 0.074 x + 2.59 + 7.4 x) \cdot 7.4

88.8 = 54.834 x + 19.166

求解步骤

(12 = 0.074 x + 2.59 + 7.4 x) \cdot 7.4

= 7.4 (12 \cdot 0.074 = x + 2.59 + 7.4 x)

打开括号

7.4 \cdot 12 = 0.074 x + 7.4 \cdot 2.59 + 7.4 \cdot 7.4 x

12 \cdot 7.4 = 0.074 x + 2.59 \cdot 7.4 + 7.4 \cdot 7.4 x

化简

12 \cdot 7.4 = 0.074 x + 2.59 \cdot 7.4 + 7.4 \cdot 7.4 x : 88.8 = 54.834 x + 19.166

88.8 = 54.834 x + 19.166

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