SOLUTION: Please help me solve this problem: Solve the following proportion. x/21 = -15/-35

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Question 1024435: Please help me solve this problem: Solve the following proportion. x/21 = -15/-35
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+x%2F21+=+%28-15%29+%2F+%28-35%29+
It would help to simplify the right side
(-) / (-) = (+)
+x%2F21+=+15%2F35+
Divide top and bottom of right side by +5+
+x%2F21+=+3+%2F+7+
Multiply both sides by +7+
+x%2F3+=+3%2F1+
Multiply both sides by +3+
+x+=+9+
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check answer:
+x%2F21+=+%28-15%29+%2F+%28-35%29+
+9%2F21+=+%28-15%29+%2F+%28-35%29+
Now I will just use calculator:
+.42857+=+.42857+
OK