7x+0.8x=9.36,

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7x+0.8x=9.36,7x+0.8x=9.36,7x+0.8x=9.36,(7+0.8)x=9.367.8x=9.36x=9.36/7.8x=1.2先合并同类项;(7+0.8)x=9.367.8x

7x+0.8x=9.36,
7x+0.8x=9.36,

7x+0.8x=9.36,
(7+0.8)x = 9.36
7.8x=9.36
x=9.36/7.8
x=1.2

先合并同类项;(7+0.8)x=9.36
7.8x=9.36
等式两边同时除以7.8;(7.8÷7.8)x=9.36÷7.8
x=1.2,希望能帮到你

(方程解) (二) 1. 15.36-3 2. 2.1×4.3+5.7×2.1 3. ,X-0.8X=6 ,x+5.6=9.4, 52-x =15 ,1÷x =1.3 ,X+8.3