what is the answer to 2 (-r+8)=4+7 (r+3) in 8th grade algebra
Let's simplify the expression. We have
2 (-r+8)=4+7 (r+3) multiply out the bracketed terms
-2r + 16 = 4 + 7r + 21 now put all the r-terms on one side and all the constant values on the other
-2r - 7r = -16 + 4 + 21 add everything together
-9r = 9 divide bith sides by 9 abd change the sign
r = -5/9
Answer: r = -1