exam Maths Puzzle Numerical Ability

What is -9=9(9-5t)

Im trying my best 2 figure out what t=
Your help would be much appreciated

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exam Other Question

Use an indirect proof to show that john exceeded the 55 mph speed limit if he left his house at 8:15 a.m. and arrived at his office 60 miles away at 9:00 a.m. Write the proof usin plot a graph of f(x)=x^2-8x+14 for 2≤x≤8 restricting.
using the same axes, plot f(x)=5 ln x for 1≤x≤9.
from the graphs drawn solve the equation x^2-8x+14=