exam Maths Puzzle Numerical Ability

using the Gauss-jordan elimination method. i have to solve the following linear system. i have to show my work. the problem is as follows
7x +5y - 3z = 16
3x - 5y =2z = -8
5x +

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exam Other Question
Problem #1 graph the inequality: 3-x<y+2 or x>y+5

Problem #2 graph the inequality: x+8y>8 and x-2y<10

Problem #3 2x-y+3>0 What is the y intercept and which region satisfies Multiply

(x+3y)(x^2-3xy+9y^2)