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kirill115 [55]
3 years ago
12

How do you do a Substitution Method y=4x-1 y=2x-5

Mathematics
1 answer:
saul85 [17]3 years ago
5 0

The first equation tells you that writing "y" is the same as writing "4x-1".

So, in the second equation, you can substitute "y" with "4x-1":

y=2x-5\mapsto 4x-1=2x-5 \iff 2x=-4 \iff x=-2

Now that we have the value for x, we can deduce the value of y:

y=2x-5 = 2(-2)-5 = -4-5 = -9

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