exam Maths Puzzle Numerical Ability

solve by substitution
1. 2x - y= -4
x+y = -5

2. 5x - 6y=21
x -2y=5

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exam Other Question

Explain how to solve equations involving absolute terms by solving following problem:

| x - � | = | � x - � | I am having problems with graphing. Can you help me solve and graph the following problem?

1. Plot the graph of the equations 2x-3y=6 and 2x-y=-10 and interperet the result.