exam Maths Puzzle Numerical Ability

USE THE GRAPH AND CHECK METHOD TO SOLVE THE LINEAR SYSTEM

-X+Y=3
X+Y=5

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exam Other Question

i didnt know where to ask this question it is for college algebra: solve the system {3x -y+2z=15
x+2y+3z=5
-2x+y-3z=-16 Solve:

5x/7 - 6x/5 = 3/35