exam Maths Puzzle Numerical Ability

i dont know how to solve equations with two variables on both sides

ex:5x - 32 = 1n + 8

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exam Other Question

what is 5x+14-2x=9-(4x+2) and maybe you could show me (5/2)-(x+1)=x(2-x) please help this stuff is new to me. Find the slope of the line through points (10,-7) and (-3,-2?