Mathematics, 29.03.2020 23:19, domenica19

-20 + 4y = -8
-20 – 2y = 4
Find the solution to the system of equations shown above by graphing

Answers: 3

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Answers

answered: janisia10

The solutions are x=0 and y= -2, if the given equations are -20x+4y=-8 and -20x-2y=4 .

Step-by-step explanation:

The given is,

-20x+4y=-8 ...............................(1)

-20x-2y=4 .................................(2)

Step:1

To find the values of x and y, we subtract the equation (1) and (2)

-20x+4y=-8

-20x-2y=4

( - )

Subtraction of the Eqn (1) and (2) becomes,

(-20x+20x)+(4y+2y)=(-8-4)

6y=-12

$y =-\frac{12}{6}$

y = -2

Substitute the value of y in Equation (2),

-20x-2y=4

-20x-(2)(-2)=4

-20x+4=-4

-20x=4-4

-20x=0

x = 0

Step:2

Check for solution,

-20x+4y=-8

Substitute the values of X and y,

(-20)(0)+(4)(-2)=-8

0-8=-8

-8 = -8

Both sides are equal so the values of x = 0 and y = -2 are equal.

Result:

The solutions are x=0 and y= -2, if the given equations are -20x+4y=-8 and -20x-2y=4 .

answered: Guest

No because if you do the higher number minus the lower number you will get a positive. if you do it the other way around you will get a negative number

answered: Guest

step-by-step explanation:

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-20 + 4y = -8
-20 – 2y = 4
Find the solution to the system of equations shown above by g...