Question

A)2n+1=4n-7

b)5n-4=3n-2n+4

Answer 1

a) 2n -4n = -7 -1
-2n = -8 (-1)
2n = 8
n = 8/2
n = 4

b) 5n -3n +2n = 4 +4
4n = 8
n = 8/4
n= 2

Answer 2

$A) \\ 2n+1=4n-7 \\ \\ 2n - 4n = -7 - 1 \\ \\ -2n = -8 *(-1) \\ \\ 2n= 8 \\ \\ n = \dfrac{8}{2} \\ \\ n = 4$

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$B) \\ 5n-4=3n-2n+4 \\ \\ 5n - 3n + 2n = 4 + 4 \\ \\ 5n -n = 8 \\ \\ 4n = 8 \\ \\ n = \dfrac{8}{4} \\ \\ n = 2$