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Vera_Pavlovna [14]

3 years ago

8

2x+y=3, 5x-2y=12 how to solve this

2 answers:

Leviafan [203]3 years ago

7 0

Start by getting one of the equations in terms of one variable, in this case lets put the first equation in terms of y

2x+y=3 ---> y=3-2x

now we plug that into the second equation

5x-2y=12 ---> 5x-2(3-2x)=12

we can then multiply and simplify

5x-2(3-2x)=12 ---> 5x-6+4x=12 ---> 9x-6=12 ---> 9x=18 ---> x=2

we can now plug x=2 into an equation to solve for y

2(2)+y=3 ---> 4+y=3 ---> y=-1

Brums [2.3K]3 years ago

7 0

2x+y=3 =4x+2y=6
5x-2y=12. =5x-2y=12
--------------------------------
9x=18: x=2
4+y=3:y=-1

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2 years ago

Which answer choice is equivalent to the expression below? Negative 7 (2 + n) + one-third (negative 9 minus 6 n) Negative 17 min

Alex

Answer:

a. -17 -9n

Step-by-step explanation:

Question written clearly below:

Which answer choice is equivalent to the expression below?

-7(2+n)+1/3(-9-6n)

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3 years ago