Solve the following simultaneous equations
a) 49x - 57y = 172; 57x - 49y = 252 (elimination method)
b) 3x + 2y = 29; 5 - y = 18 (substitution method)
c) 3x - y = 2; 2x - y = 3 (graphically)
d) y + 2x - 19 = 0; 2x - 3y + 3 = 0 (cramer's rule)
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A tyre exerts a force of 50 Newton calculate the pressure exerted by the tyre on the road if area of contract is 600 square CM
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