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(2.8+4x)╳2=10.4 x=?

5.6X+8X=10.4 8X=4.8 X=0.6

1.2x+2.8x=10.4 解:4x=10.4 x=10.4÷4 x=2.6

(4x-2.8)×2=10.4 4x-2.8=5.2 4x=8 x=2 你好,本题已解答,如果满意 请点右下角“采纳答案”。

(1)7x+2x=0.81 9x=0.81. x=0.9 (2)4(x-6)=36 x-6=9. x=15 (3)2x+0.2x*2=36 2.4x=36. x=15 (4)3.4x-6=4.2 3.4x=10.2. x=3 (5)7.8x+5=44 7.8x=49. x=245/39 (6)7.5x+2.5=20 7.5x=17.5. x=7/3 (7)25.8-2x=12-7 2x=20.8. x=10.4 (8)4x+2.8=5.04 4x=2...

先将左边式子统统乘10 得12x-2=28 将2挪动右边 得12x=28+2=30 再两边同除以3 得4x=10 那 4x-4=10-4=6

2(2.8+x)=10.4(x-3)÷2=7.513.2x+9x=33.33x=x+100x+4.8=7.26x+18=483(x+2.1)=10.512x-9x=8.713(x+5)=1692x-97=34.23.4x-48=26...

4x+2.8×3=4x+8.4 4x=10+8.4 4x=18.4 x=18.4÷4 x=4.6

3x+4x=2.8 解:7x=2.8 x=0.4

3.5-5x=2 0.3×7+4x=12.5 x÷1.5-1.25=0.75 4x-1.3×6=2.6 6x+12.8=15.8 150×2+3x=690 2x-20=4 3x+6=18 2(2.8+x)=10.4 (x-3)÷...

3/5x-1/6=2/3 2x+0.8=4 解:3/5x-1/6+1/6=2/3 +1/6 解: 2x=4-0.8 3/5x=2/3 +1/6 x=1.6 3/5x=5/6 3/5x÷3/5=5/6÷3/5 x=1/2 0.4x(x-1.2)=1.2 解: x-1.2=3 x=3+1.2 x=4.2 10/9x-1/3x=21 解: 7/9x=21 x=21x9/7 x=27 3/4x-1/2=1/4 解: 3/4x-1/2+1/...

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