Q5 of 92 Page 73

Let us solve the following simultaneous equations in two variables by the method of substitution.


Given … (1)


And … (2)


Expressing x of equation (1) in terms of y,





… (3)


Substituting (3) in (2),







⇒ 12 + 5y = 18


⇒ 5y = 18 – 12


⇒ 5y = 6


∴ y =


Substituting y value in (3),







∴ By solving, we get and .


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