book Maths Puzzle Numerical Ability

The problem goes like this....

Solve Equation

log4 (x^2 - 4) - log4 (x + 2) = 2

Read Solution (Total 0)

book Other Question

It is possible for a triangle to be which of the following?

A) both isosceles and right
B) both equilateral and equiangular
C) both scalene and acute
D) both obtuse and equilateral please help me solve these- equation: {{{ 4/5x=3 3/4}}} and {{{ 1.25n=8}}} and {{{ n/1.5=4.2}}} please explain each one. i need examples on how each problem was solve.