3n+3=n+7
3n+3-n=n+7-n (subtract n from both sides)
2n+3=7
2n+3-3=7-3 (subtract 3 from both sides )
2n=4
2n/2=4/2 (divided by 2 on both the sides)
n=2
Answer: n=2
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3n+1=7 3*2+1=7
3n + 4 = 7(- 4 from both sides)3n = 3(divide both sides by 3)n = 1
3n + 7 = 163n + 7 - 7 = 16 - 73n + 7 - 7 = 16 - 73n = 16 - 73n = 93n/3 = 9/33n/3 = 9/3n = 9/3n = 3Check:3 x 3 + 7 =? 169 + 7 =? 1616 =? 16n=3 is the correct answer.
n = 7. 3(7) + 7 = 28. 21+7=28
3n + 6 = n + 202n = 14n = 7