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Sophie [7]
3 years ago
5

What is the value of x in the equation 4x + 8y = 40, when y = 0.8? 4.6 8.4 10 12

Mathematics
2 answers:
Mnenie [13.5K]3 years ago
8 0
<span> <span><span> y           x
</span> <span> 0.8      8.4
</span> <span> 4.6      0.8
</span> <span> 8.4     -6.8
</span> <span> 10     -10
</span> 12     -14</span></span>
devlian [24]3 years ago
6 0
4x + 8y = 40

<u>When y = 0,8 :</u>

4x + 8*0,8 = 40
4x + 6,4 = 40
4x = 40 - 6,4
4x = 33,6
x = 33,6/4
x = 8,4

Answer : 8,4
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