book Maths Puzzle Numerical Ability

Hi Tutors, it's me again I need help with the following problems can you help me. Thank you so much.

y=3x+2

x=5x

y=2x+1

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book Other Question

Im having a hard time compeleting my geometry course do to lack of information. The topic is "Identifing Transversals and Angles." And I need formulas on Transversal angles, Angles (4-1/2c)-1/3[3/4(1-2c)]=1/12c