Question 1

Solve the following pair of linear equations by the substitution method.

(i) $x + y = 14$ $x - y = 4$

(ii) $s - t = 3$ $6s + 2t = 3$

(iii) $3x - y = 3$ $9x - 3y = 9$

(iv) $0.2x + 0.3y = 1.3$ $0.4x + 0.5y = 2.3$

(v) $2x + 3y = 0$ $3x - 8y = 0$

(vi) $3x + 5y = 22$ $3x - 2y = 6$