exam Maths Puzzle Numerical Ability

how do I write an equation through (1.2, 5.1) and x interger =3.7

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exam Other Question

triangle ABC transformed into triangle A'B'C'. Find the scale factor and determine if the dilation is a reduction or an enlargement.

Ab=6 cm BC= 8cm AC= 10 cm A'B'= 24 cm B'
Please help me confirm I am doing this correctly:
4(2(-5x+y)-y)-10(y-4X) with the outside set of parenthesis being brackets