標題:
f.3 math 3題
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最佳解答:
1)2-9-4x = 25+3x -9 – 4x = 5 + 3x 7x = -14 x = -2 2)1/27x-3 = 9x+2 (3-3)x-3 = 32x+4 39-3x = 32x+4 9 – 3x = 2x + 4 5x = 5 x = 1 3)1/9(32x) = 27 1/32 ( 32x ) = 33 1/32+2x = 33 3-2-2x = 33 -2 – 2x = 3 2x = -5 x = -2.5
其他解答:
f.3 math 3題
發問:
此文章來自奇摩知識+如有不便請留言告知
1. 2^-9-4x=2^5+3x 2. 1/27^x-3=9^x+2 3. 1/9(3^2x)=27 吾答既吾該別吵, 謝謝最佳解答:
1)2-9-4x = 25+3x -9 – 4x = 5 + 3x 7x = -14 x = -2 2)1/27x-3 = 9x+2 (3-3)x-3 = 32x+4 39-3x = 32x+4 9 – 3x = 2x + 4 5x = 5 x = 1 3)1/9(32x) = 27 1/32 ( 32x ) = 33 1/32+2x = 33 3-2-2x = 33 -2 – 2x = 3 2x = -5 x = -2.5
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