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2/5-k/7=3/35
We simplify the equation to the form, which is simple to understand
2/5-k/7=3/35
Simplifying:
+ 0.4-k/7=3/35
Simplifying:
+ 0.4-0.142857142857k=3/35
Simplifying:
+ 0.4-0.142857142857k=0.0857142857143
We move all terms containing k to the left and all other terms to the right.
-0.142857142857k=0.0857142857143-0.4
We simplify left and right side of the equation.
-0.142857142857k=-0.314285714286
We divide both sides of the equation by -0.142857142857 to get k.
k=2.2
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