Q1 Solve the following systems of simultaneous linear equations by the substitution method (1 to 4):
(i) x + y = 14; x - y = 4
(ii) s - t = 3; s/3 + t/2 = 6
(iii) 2x + 3y = 9; 3x + 4y = 5
(iv) 3x - 5y = 4; 9x - 2y = 7

Solution

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