book Maths Puzzle Numerical Ability

what is the answer to 1 1/4x +1/2= 5/1

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book Other Question

i need to write y+4=-2/3(x-9) in standard form.
thanks a lot for helping me! algebraic expression bx^2-cx+a^2=0. Where a, b, and c are caonstants, and x is the unknown. They differ by the sing of the squareroot. Enter the won with teh plus sign.