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lakkis [162]
3 years ago
13

System of equation by elimination 4x-6y=10 and 3x+6y=4

Mathematics
1 answer:
Whitepunk [10]3 years ago
6 0
Solving:

\left \{ {{4x-6y=10\:(I)} \atop {3x+6y=4\:(II)}} \right.

\left \{ {{4x-\diagup\!\!\!\!\!6y=10} \atop {3x+\diagup\!\!\!\!\!6y=4}} \right.

\left \{ {{4x=10} \atop {3x=4}} \right.
----------------------
7x = 14
x =  \frac{14}{7}
\boxed{\boxed{x = 2}}\end{array}}\qquad\quad\checkmark

<span>Now replace the found value of "x" in equation (II) to find the value of "y"

</span>3x+6y=4\:(II)
3*(2) + 6y = 4
6 + 6y = 4
6y = 4 - 6
6y = - 2
y =  \frac{-2}{6}  \frac{\div2}{\div2} \to \boxed{\boxed{y =  \frac{-1}{3}}} \end{array}}\qquad\quad\checkmark

Answer:
x = 2
y = - 1/3
<span>
</span>
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8 0
2 years ago
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Please solve these soon I have to turn thin in tomorrow !!!!!!!!
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a) so if you're looking for a then you substitute the a in the problem so the real question would be answered by simply doing this. 3 times (do this first) 6 times 3. so it would end up looking like this if you did it in your head. 6x3=18 then 18x3= 54 so the answer for ten after you did all the math would equal out to be 54.

d) so you're going to substitue the d again, for what it tells you d equals. in this case, d= a negative 2 so, 5 x do this first -2 x 4 = so if you did this in your head you would end up with -2 x 4 = -8 because anything times a negative is turned into a negative. so that is why the answer is -8 for the first part. then you multiply that answer by 5 because we all like the 5 dollar foot longs. so carry that into an answer of - 40. because we all know we want to be younger once we reach 40.

r) 5times -3 equals -15 times 2 would be... ding ding ding 30 because a negative times a negative is a positive. think of negatives this way. when you frown it's your smile upside down. ok so a frown is a negative, if you multiply a negative to a negative it's like turning your frown upside down. so you end up with a positive! ok?! so there. the secrets of life and math.

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Step-by-step explanation:


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