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PLEASE HELP!!!! ¡¡It's for today!!

Solve each of the following systems of equations using the three methods seen (elimination, equalization and substitution), that is, each exercise is solved by the three methods:

PLEASE HELP Its for today Solve each of the following systems of equations using the three methods seen elimination equalization and substitution that is each e class=

Respuesta :

a)

3x-5y=5

4x+y=-1

3x-5y=5

20x+5y=-5

23x=0

x=0

4(0)+y=-1

0+y=-1

y=-1

Answer for A is (0,-1)

b)

y=2x-3

y=(x-3)/2

2x-3=(x-3)/2

4x-6=x-3

3x-6=-3

3x=3

x=1

y=2(1)-3

y=2-3

y=-1

Answer for B is (1,-1)

c)

3x+2y=4

5x-2y=4

8x=8

x=1

3(1)+2y=4

3+2y=4

2y=1

y=1/2

Answer for C is (1,0.5)

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