book Maths Puzzle Numerical Ability

1/2(x-20) - 1/5(x+15) = 1/2x - 10 - 1/5x + 3 = LCD 5/10x - 10 - 2/10x + 3 =5/10x - 10 + 10 = 2/10x + 3 + 10= 5/10x = 2/10x + 13
I get this far and am not sure how to proceed, can

Read Solution (Total 0)

book Other Question
The endpoints of a diameter of a circle are (-2,1) and (6, -5).

Write the standard equationof the circle? solve: 1/e^-x^2=(e^3x)*1/e^2