Solve the system by substitution.
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Question

Solve the system by substitution.
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anonymous · Answer

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igreen · Answer

I think it wants you to do this:

$3.25x - y = -0.75$

Subtract 3.25x to both sides:
$-y = -3.25x - 0.75$

Multiply -1 to both sides:

$y = 3.25x + 0.75$

Now plug in $3.25x + 0.75$ for y in the equation $-4.5x - 2y = -12.5$ and solve for $x$.

anonymous · Answer

so   -4.5x-2(3.25x+0.75)=12.5
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igreen · Answer

$−4.5x−2y=−12.5$

$−4.5x−2(3.25x + 0.75)=−12.5$

$-4.5x -6.5x - 1.5 = -12.5$

$-11x - 1.5 = -12.5$

$-11x = -11$

$x = 1$

igreen · Answer

Yes, that's right @milk_cart0n

igreen · Answer

Are you seeing these? '�'

anonymous · Answer

yeah what are those?

anonymous · Answer

but thank you!

igreen · Answer

Idk, some glitch, just click on a different post and click back, it should be normal.

anonymous · Answer

Oh alright

igreen · Answer

We're not finished yet!

We have to plug in x = 1 into any of our equations to find the y-value.

igreen · Answer

$3.25x-y=-0.75$

$3.25(1)-y=-0.75$

$3.25-y=-0.75$

$-y = -4$

$y = 4$

igreen · Answer

So the solutions to those equations is (1, 4).

anonymous · Answer

Alright that makes more sense the way you did it, i always get the substitution ones wrong