Considering the definition of equation, 46 coins as nickels.
An equation is the equality existing between two algebraic expressions connected through the equals sign in which one or more unknown values, called unknowns, appear in addition to certain known data.
The solutions of an equation are the values that the unknowns must take for the equality to be true.
Let x be the number of other coins, you can write the equation:
2x + (x-2) = 70
Solving:
2x + x - 2= 70
2x + x= 70 + 2
3x= 72
x= 72 ÷ 3
x=24
Josiah has two fewer nickels than twice the number of other coins:
2×x-2= 2×24-2= 46
Finally, 46 coins as nickels.
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