7s + 12 = 131
Therefore, 7s = 119
s = 119/7
Therefore, s = 17
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7z + 6s + s = 7z + 7s This can then be factorised using 7 as the factor: 7z + 7s = 7(z + s)
7s + 4t
If you mean: 4(2s-1) = 7s+12 then the value of s works out as 16
12
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