-n/8 = 80
Cross multiply:
-n = 80 * 8
-n = 640
Multiply each side by -1:
-1 * -n = -1 * 640
n = -640
Cross multiply:
-n = 80 * 8
-n = 640
Multiply each side by -1:
-1 * -n = -1 * 640
n = -640
-n/8 = 80
- Thread starter math_celebrity
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- cross-multiply equation