exam Maths Puzzle Numerical Ability

please solve and show the work for 5^x=25^4
Thank you

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exam Other Question

In planning for a new item, a manufacturer assumes that the number of items produced x and the cost in dollars C of producing these ites are related by a linear equation. Projectio Please solve the system of linear equations and check any solution algebraically.

2x+4y-z=7
2x-4y+2z=-6
x+4y+z=0

*this is what i have so far:

2x+4y-z=7
-E1+E2