解方程 (1)6X+9*2.5=32.7 (2)9.72-X=1又6分之1+0.9 (3)(X+16)x=76 (4)81x-342=76*(x-2)解方程 (1)6X+9*2.5=32.7 (2)9.72-X=1又6分之1+0.9 (3)(X+16)x=76 (4)81x-342=76*(x-2) 简算23分之11*24 100*98分之5
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![解方程 (1)6X+9*2.5=32.7 (2)9.72-X=1又6分之1+0.9 (3)(X+16)x=76 (4)81x-342=76*(x-2)解方程 (1)6X+9*2.5=32.7 (2)9.72-X=1又6分之1+0.9 (3)(X+16)x=76 (4)81x-342=76*(x-2) 简算23分之11*24 100*98分之5](/uploads/image/z/5243240-56-0.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B+%EF%BC%881%EF%BC%896X%2B9%2A2.5%3D32.7+%282%299.72-X%3D1%E5%8F%886%E5%88%86%E4%B9%8B1%2B0.9+%EF%BC%883%EF%BC%89%EF%BC%88X%2B16%29x%3D76+%284%2981x-342%3D76%2A%28x-2%29%E8%A7%A3%E6%96%B9%E7%A8%8B+%EF%BC%881%EF%BC%896X%2B9%2A2.5%3D32.7+%282%299.72-X%3D1%E5%8F%886%E5%88%86%E4%B9%8B1%2B0.9+%EF%BC%883%EF%BC%89%EF%BC%88X%2B16%29x%3D76+%284%2981x-342%3D76%2A%28x-2%29+%E7%AE%80%E7%AE%9723%E5%88%86%E4%B9%8B11%2A24+100%2A98%E5%88%86%E4%B9%8B5)
解方程 (1)6X+9*2.5=32.7 (2)9.72-X=1又6分之1+0.9 (3)(X+16)x=76 (4)81x-342=76*(x-2)解方程 (1)6X+9*2.5=32.7 (2)9.72-X=1又6分之1+0.9 (3)(X+16)x=76 (4)81x-342=76*(x-2) 简算23分之11*24 100*98分之5
解方程 (1)6X+9*2.5=32.7 (2)9.72-X=1又6分之1+0.9 (3)(X+16)x=76 (4)81x-342=76*(x-2)
解方程
(1)6X+9*2.5=32.7 (2)9.72-X=1又6分之1+0.9 (3)(X+16)x=76 (4)81x-342=76*(x-2)
简算
23分之11*24 100*98分之5
解方程 (1)6X+9*2.5=32.7 (2)9.72-X=1又6分之1+0.9 (3)(X+16)x=76 (4)81x-342=76*(x-2)解方程 (1)6X+9*2.5=32.7 (2)9.72-X=1又6分之1+0.9 (3)(X+16)x=76 (4)81x-342=76*(x-2) 简算23分之11*24 100*98分之5
(1)6X+9*2.5=32.7
6x=32.7-22.5
6x=10.2
x=1.7
(2)9.72-X=1又6分之1+0.9
-x=7/6+0.9-9.72
x=9.72-(35+27)/30
x=9.72-1.2
x=8.62
(3)(X+16)x=76
x²+16x+8²=76+8²
(x+8) ²=140
x+8=±2√35
∴x1=-8+2√3 x2=-8-2√35
(4)81x-342=76*(x-2)
81x-76x=342-152
5x=190
x=38
简算
23分之11*24
原式=[11×(23+1) ]/23
=11+11/23
=11(24/23)
100*98分之5
原式=5/[100(100-2)]
=1/[20(100-2)]
=1/1960