Solve the following system of equations using substitution.

5y = x - 15

-3y = -12x - 9

What is the value of x?

(Enter as a fraction)

x - 15 = 5y

x = 5y + 15

-3y = -12(5y + 15)

-3y = -60y - 180

57y = 180

y = 60/19= 3 3/19

x = 5(60/19) + 15

x = 300/19 + 15

x = 300/19 + 285/19

x = 585/19= 30 15/19

Step-by-step explanation:

answer: yes youre right.

step-by-step explanation:

none.

step-by-step explanation:

m

1

=

5

m1=5

b

=

−

1

b=-1

find the slope and y-intercept of the second equation.

tap for more

m

2

=

0

m2=0

b

=

−

6

b=-6

compare the slopes

m

m of the two equations.

m

1

=

5

,

m

2

=

0

m1=5,m2=0

compare the two slopes in the decimal form. if the slopes are equal, then the lines are parallel. if the slopes are not equal, then the lines are not parallel.

m

1

=

5

,

m

2

=

0

m1=5,m2=0