Question

In an isosceles triangle, the equal sides measure 3x - 1 and x + 7 units. The value of x is ___ units.

Answer 1

Since the sides are equal,
$3x-1=x+7$
$\Rightarrow 2x=8$
$\Rightarrow x=\frac{8}{2}=4\text{units}$
(1 mark)