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zhuklara [117]
3 years ago
8

12 r - 18 = 13 r + 18

Mathematics
2 answers:
melamori03 [73]3 years ago
6 0
First you want to isolate the variable, do this by adding 18 to both sides. You're left with 12r = 13r + 36, then subtract 13r to get the variables alone. You're then left with -1r = 36, multiply by -1 to remove the negative. The final result would be (1) r = 36.
Montano1993 [528]3 years ago
5 0
12r-18=13r+18
-12r. -12r
1r-18=18
+18 +18
1r= 36
1r/1=36/1
r=36
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