exam Maths Puzzle Numerical Ability

Solve using a Matrix Equation(matrix inverse)
2x-3y=13
x+y=-1

Please help, this stuff is new to me!!

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exam Other Question
Graph the system of inequalities

x<=2
y>=-2x+3 1) A computer store has 10 copies of a word processing program, 12 copies of a spread sheet program, and 8 copies of a draw program. Three of the word processing, four of the sprea