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解方程5(x+2.4)=25.5

5(x+2.4)=25.5 解:x+2.4=25.5÷5 x+2.4=5.1 x=5.1-2.4 x=2.7

解:X+2.4X=5 3.4X=5 X=5/3.4 X=25/17 X≈1.4706

5.2x-2.4x=28, 2.8x=28, x=10

8×-5.2=×-2.4 解:8x-x=5.2-2.4 7x=2.8 x=0.4

5×(x_2.4)=20 解:5x-12=20 5x=20+12 x=32÷5 x=6.4 供参考

x-2.4+3.5=4解方程 解:原方程即: x+1.1=4 x=4-1.1 x=2.9 把x=2.9代入原方程检验, 2.9-2.4+3.5 =0.5+3.5 =4

1 x = 2.5 - (8.5 / 5) = 0.6 2 x = 28.5 - 13 = 15.5 3 x = 26.4 / 4 = 6.6 4 x = 19 / (7.5 - 3.5) = 4.75

(1)x-5.2=2.32 x-5.2+5.2=2.32+5.2 x=7.52;(2)2.4+x=10.42.4+x-2.4=10.4-2.4 x=8;(3)x-12.3=3.44x-12.3+12.3=3.44+12.3 x=15.74;(4)x+1.2=14.4 x+1.2-1.2=14.4-1.2 x=13.2(5)31.8+x=44.331.8+x-31.8=44.3-31.8 x=12.5;(6)x-6.78...

x=5

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