If you mean: 10-2k = 4 then k = 3
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(7t³ + 2k4)(7t³ - 2k4)
For any non-zero integer k, (90*k)/(100*k) is an equivalent fraction.
1 km = .6213 mile 10 km = 6.213 miles ■
10/5 = 8/4
1000 is the equivilant to K