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6.3x/4=2.52 解方程

6.3x=2.52×4 x=9.08÷6.3 x≈0.144

6.3(x+2)=4(x+4) 解:6.3x+12.6=4x+16 6.3x-4x=16-12.6 2.3x=3.4 x=34/23

0.4x+6.3-6.3=10.5-6.30.4x=4.20.4x÷0.4=4.2÷0.4x=10.5

(1-40%)x=6.3 0.6x=6.3 x=6.3÷0.6 x=10.5 2/3x+3/4x=1 8/12x+9/12x=1 17/12x=1 x=12/17 1/4x-5%=4.8 1/4x = 4.8+0.05 1/4x = 4.85 x=4.85x4 x=19.4

(1)4.2x-2.7×4=6, 4.2x-10.8+10.8=6+10.8, 4.2x=16.8, 4.2x÷4.2=16.8÷4.2, x=4;(2)0.8x+x=5.4, 1.8x=5.4, 1.8x÷1.8=5.4÷1.8, x=3;(3)2x-3.4=7.2, 2x-3.4+3.4=7.2+3.4, 2x=10.6, 2x÷2=10.6÷2, x=5.3;(4)5.3+3x=6.8, 5.3+...

五年级上册

(1)2x+8=16 2x=16-8 x=8÷2 x=4 (2)x÷5=10 x=5×10 x=50 (3)x+7x=8 8x=8 x=8÷8 x=1 (4)9x-3x=6 6x=6 x=6÷6 x=1 (5)6x-8=4 6x=8+4 x=12÷6 x=2 (6)5x+x=9 6x=9 x=9÷6 x=1.5 (7)8x-8=6x 8x-6x=8 2x...

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