Answer:
hii
Explanation:
Group Like Terms
2r-r+8=-7
Add smiliar elements
r+8=-7
Subtract 8 form both sides
r+8-8=-7-8
SImplify
r=-15
r = -15
2r + 8 - r = -7
~Combine like terms
r + 8 = -7
~Subtract 8 to both sides
Best of Luck!
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