exam Maths Puzzle Numerical Ability

solve and graph 6(x-4)is greater than or equal to 6+x

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exam Other Question

Find the equation of the line containing the point (-1,3) and perpendicular to hte line 2x+4y=-1 Can you please help me solve by using the subtitution and elimination method (unless there is no infnite number or solution.)
y = 4 - x,
3x + 4y = 21