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WITCHER [35]
3 years ago
8

0.4x + 3.9=5.78 I got x=9.75 Is this correct ?

Mathematics
2 answers:
alexgriva [62]3 years ago
8 0
0.4x+3.9=5.78
-3.9        -3.9
0.4x=1.88
-----   ------
0.4     0.4
x = 4.7
melamori03 [73]3 years ago
7 0
No.  First subtract 3.9 from both sides.  then divide your result by 0.4.
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