解方程:49+7x=(50+8x)x90%
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解方程:49+7x=(50+8x)x90%
解方程:49+7x=(50+8x)x90%
解方程:49+7x=(50+8x)x90%
49+7x=(50+8x)x90%
49+7x=45+7.2x
7.2x-7x=49-45
0.2x=4
x=20
49+7x=(50+8x)x90%
49+7x=45+7.2x
7.2x-7x=49-45
0.2x=4
x=20
49+7x=(50+8x)x90%
49+7x=45+7.2x
7.2x-7x=49-45
0.2x=4
x=20
49+7x=(50+8x)x90%
49+7x=45+7.2x
7.2x-7x=49-45
0.2x=4
x=20