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xxTIMURxx [149]
3 years ago
11

Solve y=-3x+5 5x-4y=-3

Mathematics
1 answer:
kirill [66]3 years ago
6 0
Y = -3x + 5

   5x - 4(-3x + 5) = -3
5x + 4(3x) - 4(5) = -3
     5x + 12x - 20 = -3
             17x - 20 = -3
                   + 20 + 20
                     17x = 17
                      17     17
                         x = 1
y = -3x + 5
y = -3(1)  + 5
y = -3 + 5
y = 2
(x, y) = (1, 2)
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fiasKO [112]
<h3>Answer:    360</h3>

==========================================================

Explanation:

We have 3 even values (2,4, and 6) so this is the number of choices we have for the units digit. Recall that a number is even if the units digit is 0,2,4,6 or 8.

Once we have the units digit selected, we have 6-1 = 5 choices for the first slot, 6-2 = 4 choices for the second slot, and so on until we get down to 6-5 = 1 choice for the fifth slot

We could write it out like this

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