exam Maths Puzzle Numerical Ability

Please solve and graph the inequality. thanks!

-3 < 2x - 1 < 9

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exam Other Question

use row operations to solve the system
x+y-z=1
3x-y+z=1
x-4y=+2z=-22 Find values for m and b in the following system so that the solution to the system
is (-3, 4).
5x + 7y = b
mx + y = 22
Thank you