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+2

1242

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+445

$\frac{2}{3}s + \frac{1}{3}=\frac{3}{4}s-\frac{1}{4}$ I totally forget how to add and subtract fractions

CPhill · Answer 1 · 2017-09-06T06:36:54

2/3 (s) + 1/3 = 3/4(s) - 1/4

multiply through by the common denominator of 3,4 = 12

8s + 4 = 9s - 3 add 3 to both sides, subtract 8s from both sides

7 = s