= -6
-2x + y
-x+3y
= -6

x = 2.4 or 12/5, y = -1.2

Step-by-step explanation:

-2x + y = -6

=> y = 2x - 6

-x + 3y = -6

=> -x + 3(2x - 6)  = -6

=> -x + 6x - 18 = -6

=> 5x = 12

=> x = 12/5 or 2.4

-x + 3y = -6

=> - (2.4) + 3y = -6

=> 3y = -6 + 2.4

=> 3y = -3.6

=> y = - 1.2

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -

step-by-step explanation:

what was your answer?