exam Maths Puzzle Numerical Ability

how many solutions do this linear system have? 2x-6y=-14,-2x+3y=7

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exam Other Question

Find AB if the coordinate of A is -5 and the coordinate of B is 17. Find the determinant of matrix B if we know that matrix A det[a, b, c][d, e, f][g,h,i] = 5.

B = [a, b, c][a+2d, b+2e, c+2f][3a+g, 3b+h, 3c+i]