(0.4x+0.6)*5=9怎么做

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(0.4x+0.6)*5=9怎么做

(0.4x+0.6)*5=9怎么做
(0.4x+0.6)*5=9怎么做

(0.4x+0.6)*5=9怎么做
(0.4x+0.6)*5=9
2x+3=9
2x=6
x=3

2X+3=9
2X=6
X=3

(0.4x+0.6)*5=9
2x+3=9
2x=9-3=6
x=3

0.4x+0.6=9/5
0.4x=1.8-0.6
0.4x=1.2
x=1.2/0.4
x=3