Question

http://prntscr.com/77czlw

Answer 1

replace r in the first equation by 47-7w:-

-9(47+7w) + 11w = -111
-423- 63w + 11w = -111

can you continue from here , to find the value of w?

Answer 2

No :/

Answer 3

first add 423 to both sides of the equation;-
-423- 63w + 11w = -111
+423 + 423


what does that give us?

Answer 4

w=-6

Answer 5

the 423 disappears from the left side and we need to work out -111+423 on the right side

Answer 6

and you said you couldn't do it ?

correct w = -6

Answer 7

LOL sorry XD

Answer 8

now plug w = -6 into the original equation , say r = 47 + 7w to get the value of r.