It is: 25+(2*13) = 51
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3n + 2n = 25 5n = 25 n = 5
2n + 19 = -7 2n = -7 - 19 2n = -26 n= -13
On = 2n - 1 so O13 = 2*13 - 1 = 26 - 1 = 25
-7 = 2n + 19 Subtract 19 from both side -26 = 2n Divide by 2 on both sides n = -13
6n - 2n + 2 = n - 11 4n - n = -11 - 2 3n = -13 n = -13/3 = -4.3333