book Maths Puzzle Numerical Ability

solve for m 6m-5n=-14

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book Other Question

directions: solve by graphing.

-3<_x<_2 (-3 is less than or equal to x which is leass than or equal to 2)
y<-2x+1 (y is less than -2x+1)

(i do not understand how to graph
Hi I am having trouble with this problem: The directions say to multiply
5x(-3x^4+4x)
Thank you for your help