exam Maths Puzzle Numerical Ability

x(5.5-1.1)-(3.7 x 5)=120
how do i solve for x?

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exam Other Question

Write a paragraph proof

Adjacent angles QRS and QRT. Prove that point Q is in the interior of SRT. I am not sure if I am in the right area of algebra. I need to know about precision and accuracy.
Example what is the precision and accursay for the following measurements
0.0524c