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Margaret [11]
3 years ago
7

Complete the solution of the equation. Find the value of y when x equals 15.

Mathematics
2 answers:
NikAS [45]3 years ago
5 0
<span>3x ‒ 8y = 5

substitute with x=15

3(15) - 8y = 5
45 - 8y = 5
-8y = -40
 y= 5

</span>

I hope that helps!



GuDViN [60]3 years ago
4 0
So first, we want to substitute in 15 to all the x variables.

So,

3x - 8y = 5

Becomes

3 * 15 - 8y = 5

Or, 

45 - 8y = 5

So here, you can subtract 45 from both sides to move all like terms to one side.

-8y = 5 - 45

And then simplify:

-8y = -40

Then divide both sides by -8

y = 5
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