Write it as an equation: n/7 - 8 = 10
Add 8 to bot sides: n/7 = 18
Multiply both sides by 7: n = 126
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5n + 15 = 25 you subtract 15 from both sides then you get 10 then divided 5n by 10 you get 2n
x = -10
x - 2x + 10 + 4x = 70 Combine like terms: 3x + 10 = 70 Subtract 10 from both sides: 3x = 60 Divided both sides by 3: x = 20
2x+8=10... Subtract 8 on both sides, then devide by 2... 2x=2... x=1
10