For number :1
[tex]1.) \\ 54 = 15N + 9 \\⟹ - 15N + 54 = 9 \\⟹ - 15N = 9 - 54 \\⟹ - 15N = - 45 \\⟹45 \div 15 \\⟹{\boxed{N = 3}}[/tex]
For number :2
[tex]2.) \\ 11N - 43 =7N + 61 \\⟹11N - 7N - 43 = 61 \\⟹11N - 7N = 61 +43 \\⟹4N = 61 + 43 \\⟹4N = 104 \\⟹104 \div 4 \\⟹{\boxed{N = 26}}[/tex]
Answer:
1.)
[tex]{\boxed{N = 3}}[/tex]
2.)
[tex]{\boxed{N = 26}}[/tex]
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