解方程.2x-5.2=2.84.3x-1.8x=97.513(x+5)=1692x-20=42x+2.8×2=10.4x+2.4x=5.1X-0.36x=163(x+2.1)=1
解方程.2x-5.2=2.84.3x-1.8x=97.513(x+5)=1692x-20=42x+2.8×2=10.4x+2.4x=5.1X-0.36x=163(x+2....
解方程.2x-5.2=2.84.3x-1.8x=97.513(x+5)=1692x-20=42x+2.8×2=10.4x+2.4x=5.1X-0.36x=163(x+2.1)=10.542x+25x=1344x-3×9=295(x+1.5)=17.5(x-3)÷2=7.52.5x=143.8+x=6.3x-7.9=2.6.
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2x-5.2=2.8, 2x-5.2+5.2=2.8+5.2, 2x=8, 2x÷2=8÷2, x=4, 4.3x-1.8x=97.5, 2.5x=97.5, 2.5x÷2.5=97.5÷2.5, x=39, 13(x+5)=169, 13x+65=169, 13x+65-65=169-65, 13x=104, 13x÷13=104÷13, x=8, 2x-20=4, 2x-20+20=4+20, 2x=24, 2x÷2=24÷2, x=12, 2x+2.8×2=10.4 2x+5.6=10.4, 2x+5.6-5.6=10.4-5.6, 2x=4.8, 2x÷2=4.8÷2, x=2.4, x+2.4x=5.1, 3.4x=5.1, 3.4x÷3.4=5.1÷3.4, x=1.5, X-0.36x=16, 0.64x=16, 0.64x÷0.64=16÷0.64, x=25, 3(x+2.1)=10.5, 3x+6.3=10.5, 3x+6.3-6.3=10.5-6.3, 3x=4.2, 3x÷3=4.2÷3, x=1.4, 42x+25x=134, 67x=134, 67x÷67=134÷67, x=2, 4x-3×9=29, 4x-27=29, 4x-27+27=29+27, 4x=56, 4x÷4=56÷4, x=14, 5(x+1.5)=17.5 5x+7.5=17.5, 5x+7.5-7.5=17.5-7.5, 5x=10, 5x÷5=10÷5, x=2, (x-3)÷2=7.5, (x-3)÷2×2=7.5×2, x-3=15, x-3+3=15+3, x=18, 2.5x=14, 2.5x÷2.5=14÷2.5, x=5.6; 3.8+x=6.3, 3.8+x-3.8=6.3-3.8, x=2.5, x-7.9=2.6. x-7.9+7.9=2.6+7.9, x=10.5. |
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