exam Maths Puzzle Numerical Ability

Use the two given functions to write y as a function of x.
y=-7t+10, t=-9x-4

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Hi,
Can you help me with this math problem?Thanks.
17.Decompose into partial fractions.

2x^2-24x+35/(x^2+2x-7)(x-2)

Answer: 7x/x^2+2x-7 - 5/x-2 2x2(p + q3) - (p + q3) factor completely