x + 0
x + 1
x + 2
x + 3
4x + 6 = 1680
- 6
4x = 1674
Divide by 4
x = 418.5
4(418.5) + 6 = 1680
Second way:
x + 4
4x + 10 = 1680
- 10
1670 = 4x
Divide each side by 4
x = 417.5
4(417.5) + 10 = 1680
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