exam Maths Puzzle Numerical Ability

d/0.2=3d+2.1

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exam Other Question

HG and EF are bases, HI-height,

If HG=14, HI=2x+2, EF=4x+4, area=170, find x, HI, and EF. how do i solve a linear equation.....is there a step by step introduction that i could use?