exam Maths Puzzle Numerical Ability

(7x-5)-(3x+7)

(2xsquared-3x+1)-(5xsquared-3x+10)

(8x+6)-(10x+16)+(4x-6)

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exam Other Question

Can someone please help me solve this problem.
the equation of the line with x-intercept (-3,0) and undefined slope.
Write
Thank you
graph
3x-6y=9
x-2y=3