exam Maths Puzzle Numerical Ability

Solve the following 2 x 2 systems using substitutions

x -6y = 50
2x + 3y = -35

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exam Other Question

I am trying to figure the equation for 3x+4y=12 (0, ),(5, ), (3/4, ),(0, ), (8/3, ) find the fourth term of a geometric sequence in which a1=-3 and r=7