x-7=6,3x+4=13,5x-2×8=19怎求的啦
1个回答
x-7=6
x=6+7
x=13
3x+4=13
3x=13-4
3x=9
x=9/3
x=3
5x-2×8=19
5x-16=19
5x=19+16
5x=35
x=35/5
x=7
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解方程,五年级3x+4=13 5x-2×8=19 0.8x+3.4x=19 5x+45=47.5 7.6x-7x=3.6
19x-8x=55 2×(7x-4x)=18 6x+8x=1.4×3 5x+0.1x=50+6.1 7.2x-3.6x=
19x-8x=55 2×(7x-4x)=18 6x+8x=1.4×3 5x+0.1x=50+6.1 7.2x-3.6x=
解方程: 2.7×2-1.5x=0 13x-6.8x+x=46.8 2.6x-6.5+3.5=10 2×(x-0.7)=
9x=13.5和8x+2.6=22.6和3.6x-3×4.5=31.5和0.7x-0.5=8.6和(x+3)×2=8和2
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解方程. 4.2x-2.7×4=6 0.8x+x=5.4 2x-3.4=7.2 5.3+3x=6.8 6.3-2x+4.
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2.1X+7.9X=6.9 5X+0.8×2=7.12X+5.8=8.2 6X-3×4=1.2