Answer: s = -3
Step-by-step explanation:
25 = 13 - 4s
-13 -13
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12 = -4s
12/-4 = -4/-4
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-3 = s
Answer:
s = -3
Better to say, "Solve 25 = 13 - 4s for s." "Answer" is too general.
Starting with 25 = 13 - 4s, subtract 13 from both sides, to isolate -4s:
12 = -4s, or s = -12/4, or s = -3
