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3 years ago

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What is the solution to the system of equations? Y=2x-5. -8x-4y= -20

1 answer:

stiv31 [10]3 years ago

5 0

<span>Y=2x-5
-8x-4y= -20
---------------------------
Substitute 2x-5 for y in </span> -8x-4y= -20
<span>-8x-<span>4<span>(<span>2x-5</span>)</span></span></span>=-<span>20
</span>-16x+20=-<span>20
</span>---------------------------------------
Add -20 on each side
<span>-16x+20+-20</span>=-<span>20+-20
</span>-16x = -40
------------------------------------------------
Divide each side by -16
16x / -16 = -40 / -16
x = 5/2 or 2.5
now we have x
===============================================================
To find Y Substitute 2.5 for X in y=<span><span>2x-</span><span>5
y = 2(2.5)-5
y = 0
---------------------------------------
X = 5/2 or 2.5 and Y = 0</span></span>

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Step-by-step explanation:

Given the expression

$\frac{2}{5}y+\frac{1}{5}x-0.2y-6+\left(-2\right)$

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