trishasnell
trishasnell trishasnell
  • 20-04-2016
  • Mathematics
contestada

what is the answer for y=2x-5 and 4x-y=7

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TSO
TSO TSO
  • 20-04-2016
Substitute the first equation into the second equation. You will get:

4x - (2x - 5) = 7

Distribute the negative sign into the parenthesis:

4x - 2x + 5 = 7

Simplify

2x + 5 = 7

Subtract 5 on both sides

2x = 2

x = 1

Now, substitute x = 1 into the first equation:

y = 2(1) - 5

y = 2 - 5

y = -3


The solution to the system of equations is (1, -3).
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