Answer:
r=8
Explanation:
In the beginning you have to think about -3 x what = 6. It's -2. How can we get -2 from 6, we minus 8, so r = 8.
That also works in all the other equations if you want to try that out.
Answer: a) r = 8 B) step two
Step 1: -3(6 - r) = 6
Step 2: -18 + 3r = 6 This is where they made the error (-3 × -r = +3r)!
Step 3: 3r = 24
Step 4: r = 8
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