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2 years ago

HELPPPPPP MEEEEE y=6x-1 and -2x-3y=-2 USING SUBSTITUTION

1 answer:

7 0

Answer:
x = 4
y =23

work:
plug in the value of Y to -2x-3y=-2. -2x - 3(6x-1) = -2
multiply 3 and the numbers in parenthesis. -2x -18x - 3 =-2
combine like terms (-2x -18x). -20x - 3 = -2
subtract 3 from both sides to isolate the variable. -20x = -5
divide to isolate the variable (-20/-5) x = 4
-
now that we know the value of x, it'll be easy to find Y.
Plug it in to the first equation.
y=6(4)-1
y = 24 - 1
y = 23

so x = 4
and y = 23

hope this helps! :D

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Recall that

$u(t)=\begin{cases}0&\text{for }t$

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If we shift the argument by 1 and scale by -5, we have

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For the next piece, we can add another scaled and shifted step like

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(3,4)

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than you're going to substitute the given value of y into the equation $-2x=2-2$ × $4$

then you're going to solve the equation for x

your equation should now be: x=3

then the possible solution of the system is the order pair: (x,y)=(3,4)

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