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2 years ago

4x - y = -4 5x = 2y +1 how do I solve this using elimination?

Mathematics

2 answers:

TEA [102]2 years ago

6 0

Answer: x=-3, y=-8

Step-by-step explanation:

you will leave the first equation alone for now

the second, we will subtract 2y from both sides

5x-2y=1

now you system is

4x-y=-4

5x-2y=1

we will multiply the first equation with -2

-8x+2y=8

5x-2y=1

add both equations, we get -8x+5x=9, -3x=9,

x=-3

we will replace x with -3 in any equation, lets use 4x-y=-4,

-12-y= -4, -y=12-4, -y=8, y=-8

julia-pushkina [17]2 years ago

4 0

8x - 2y = -8
-5x + 2y = -1

3x = -9
x = -3

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