exam Maths Puzzle Numerical Ability

To solve this system of 3 linear equations using Gaussian Elimination I came up with (1, 1/3, 4/3) but the 4/3 for z doesn't work in the 3x + y - 2z = 2 equation. Can you help? (I

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exam Other Question

Could someone help me factor completly 5x^2y^7-15x^3y^4

thanks in advance for the help Use a porportion or the percent equation to answer the question.

What percent of 50 is 45?

Any help with this equation would be Greatly</b> appreciated.