The equivalent is 7s+2s = 9s
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You said that 4(2s - 1) = 7s + 12Eliminate parentheses: 8s - 4 = 7s + 12Add 4 to each side: 8s = 7s + 16Subtract 7s from each side: s = 16
It simplifies to: 2s+4R
The answer is 44
2s-2b= a+b+c-2b simplified that would be a+c-b.
If you mean: -4+3+2s = 15 then s = 8