2n +9+5n=30 need help on this
2 answers:
2n+9+5n=30 combine like terms on left side
7n+9=30 subtract 9 from both sides
7n=21 divide both sides by 7
n=3
N = 3
add like terms: 7n + 9 = 30
subtract 9 from both sides: 7n = 21
divide 7 from both sides
n = 3
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