exam Maths Puzzle Numerical Ability

Y = -3X + 8
4X + 3Y = 0

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exam Other Question

.... (x-8)
3 ----- +7 = 34
.... 5


It's suppose to be (x-8) over 5
Could you help me with this one please
2-5x x+4
Solve 16^ =64^
16 to the power of 2-5x=64 to power of x+4
thank you for your time