0.2*x+15=0.5*9求解
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0.2*x+15=0.5*9求解0.2*x+15=0.5*9求解0.2*x+15=0.5*9求解0.2*x+15=0.5*90.2*x=0.5*9-150.2x=-10.5x=-10.5÷0.2x=-
0.2*x+15=0.5*9求解
0.2*x+15=0.5*9求解
0.2*x+15=0.5*9求解
0.2*x+15=0.5*9
0.2*x=0.5*9-15
0.2x=-10.5
x=-10.5÷0.2
x=-52.5
2x+150=5*9=45
2x=-105
x=-52.5
0.2x=4.5-15
x=-10.5÷0.2
x=-52.5