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make the subject (p)

p+3=(pq+r)/2

2p + 3 = pq + r

Transpose terms by subtracting pq and 3 from both sides.

2p - pq = r - 3

p(2 - q) = r - 3

p = (r-3)/(2-q)

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4. ### 12th grade maths factorising expressions

make the subject (u) p=5t-u/u

factorise: 2x^2+6x-16, and 14x^2-3x-2. Solve: 6y^2-5y-6=0, and 8x^2-2x-1=0. Rearrange: p=5t-u/u to make u the subject, and p(q+r)=(q-p). please help i've done about 40 questions and im just stuck on these. thanks for the help

just like to check if ive got these right. if not can you help?